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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Annelein Meisner; Annelein Meisner; Annelein Meisner; orcid Samuel Jacquiod;
    Samuel Jacquiod
    ORCID
    Harvested from ORCID Public Data File

    Samuel Jacquiod in OpenAIRE
    +6 Authors

    It is increasingly acknowledged that climate change is influencing terrestrial ecosystems by increased drought and rainfall intensities. Soil microbes are key drivers of many processes in terrestrial systems and rely on water in soil pores to fulfill their life cycles and functions. However, little is known on how drought and rainfall fluctuations, which affect the composition and structure of microbial communities, persist once original moisture conditions have been restored. Here, we study how simulated short-term drying and re-wetting events shape the community composition of soil fungi and prokaryotes. In a mesocosm experiment, soil was exposed to an extreme drought, then re-wetted to optimal moisture (50% WHC, water holding capacity) or to saturation level (100% WHC). Composition, community structure and diversity of microbes were measured by sequencing ITS and 16S rRNA gene amplicons 3 weeks after original moisture content had been restored. Drying and extreme re-wetting decreased richness of microbial communities, but not evenness. Abundance changes were observed in only 8% of prokaryote OTUs, and 25% of fungal OTUs, whereas all other OTUs did not differ between drying and re-wetting treatments. Two specific legacy response groups (LRGs) were observed for both prokaryotes and fungi. OTUs belonging to the first LRG decreased in relative abundance in soil with a history of drought, whereas OTUs that increased in soil with a history of drought formed a second LRG. These microbial responses were spread among different phyla. Drought appeared to be more important for the microbial community composition than the following extreme re-wetting. 16S profiles were correlated with both inorganic N concentration and basal respiration and ITS profiles correlated with fungal biomass. We conclude that a drying and/or an extreme re-wetting history can persist in soil microbial communities via specific response groups composed of members with broad phylogenetic origins, with possible functional consequences on soil processes and plant species. As a large fraction of OTUs responding to drying and re-wetting belonged to the rare biosphere, our results suggest that low abundant microbial species are potentially important for ecosystem responses to extreme weather events.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Frontiers in Microbi...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    Frontiers in Microbiology
    Article . 2018 . Peer-reviewed
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    Frontiers in Microbiology
    Article
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    PubMed Central
    Other literature type . 2018
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    Frontiers in Microbiology
    Article . 2018
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    Frontiers in Microbiology
    Article . 2018
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    Article . 2018
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    Research@WUR
    Article . 2018
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    HAL INRAE
    Article . 2018
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    Wageningen Staff Publications
    Article . 2018
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Article . 2018
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Frontiers in Microbi...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Frontiers in Microbiology
      Article . 2018 . Peer-reviewed
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      Frontiers in Microbiology
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      PubMed Central
      Other literature type . 2018
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      Frontiers in Microbiology
      Article . 2018
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      Frontiers in Microbiology
      Article . 2018
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      ProdInra
      Article . 2018
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      Article . 2018
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      Article . 2018
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    Authors: Annelein Meisner; Annelein Meisner; Annelein Meisner; orcid Samuel Jacquiod;
    Samuel Jacquiod
    ORCID
    Harvested from ORCID Public Data File

    Samuel Jacquiod in OpenAIRE
    +6 Authors

    It is increasingly acknowledged that climate change is influencing terrestrial ecosystems by increased drought and rainfall intensities. Soil microbes are key drivers of many processes in terrestrial systems and rely on water in soil pores to fulfill their life cycles and functions. However, little is known on how drought and rainfall fluctuations, which affect the composition and structure of microbial communities, persist once original moisture conditions have been restored. Here, we study how simulated short-term drying and re-wetting events shape the community composition of soil fungi and prokaryotes. In a mesocosm experiment, soil was exposed to an extreme drought, then re-wetted to optimal moisture (50% WHC, water holding capacity) or to saturation level (100% WHC). Composition, community structure and diversity of microbes were measured by sequencing ITS and 16S rRNA gene amplicons 3 weeks after original moisture content had been restored. Drying and extreme re-wetting decreased richness of microbial communities, but not evenness. Abundance changes were observed in only 8% of prokaryote OTUs, and 25% of fungal OTUs, whereas all other OTUs did not differ between drying and re-wetting treatments. Two specific legacy response groups (LRGs) were observed for both prokaryotes and fungi. OTUs belonging to the first LRG decreased in relative abundance in soil with a history of drought, whereas OTUs that increased in soil with a history of drought formed a second LRG. These microbial responses were spread among different phyla. Drought appeared to be more important for the microbial community composition than the following extreme re-wetting. 16S profiles were correlated with both inorganic N concentration and basal respiration and ITS profiles correlated with fungal biomass. We conclude that a drying and/or an extreme re-wetting history can persist in soil microbial communities via specific response groups composed of members with broad phylogenetic origins, with possible functional consequences on soil processes and plant species. As a large fraction of OTUs responding to drying and re-wetting belonged to the rare biosphere, our results suggest that low abundant microbial species are potentially important for ecosystem responses to extreme weather events.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Frontiers in Microbi...arrow_drop_down
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    Frontiers in Microbiology
    Article . 2018 . Peer-reviewed
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    Frontiers in Microbiology
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      Frontiers in Microbiology
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    Authors: Chowdhury, Niaz Bahar; orcid Schroeder, Wheaton;
    Schroeder, Wheaton
    ORCID
    Harvested from ORCID Public Data File

    Schroeder, Wheaton in OpenAIRE
    Sarkar, Debolina; Amiour, Nardjis; +4 Authors

    Abstract The growth and development of maize (Zea mays L.) largely depends on its nutrient uptake through the root. Hence, studying its growth, response, and associated metabolic reprogramming to stress conditions is becoming an important research direction. A genome-scale metabolic model (GSM) for the maize root was developed to study its metabolic reprogramming under nitrogen stress conditions. The model was reconstructed based on the available information from KEGG, UniProt, and MaizeCyc. Transcriptomics data derived from the roots of hydroponically grown maize plants were used to incorporate regulatory constraints in the model and simulate nitrogen-non-limiting (N+) and nitrogen-deficient (N−) condition. Model-predicted flux-sum variability analysis achieved 70% accuracy compared with the experimental change of metabolite levels. In addition to predicting important metabolic reprogramming in central carbon, fatty acid, amino acid, and other secondary metabolism, maize root GSM predicted several metabolites (l-methionine, l-asparagine, l-lysine, cholesterol, and l-pipecolate) playing a regulatory role in the root biomass growth. Furthermore, this study revealed eight phosphatidylcholine and phosphatidylglycerol metabolites which, even though not coupled with biomass production, played a key role in the increased biomass production under N-deficient conditions. Overall, the omics-integrated GSM provides a promising tool to facilitate stress condition analysis for maize root and engineer better stress-tolerant maize genotypes.

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    Journal of Experimental Botany
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    Authors: Chowdhury, Niaz Bahar; orcid Schroeder, Wheaton;
    Schroeder, Wheaton
    ORCID
    Harvested from ORCID Public Data File

    Schroeder, Wheaton in OpenAIRE
    Sarkar, Debolina; Amiour, Nardjis; +4 Authors

    Abstract The growth and development of maize (Zea mays L.) largely depends on its nutrient uptake through the root. Hence, studying its growth, response, and associated metabolic reprogramming to stress conditions is becoming an important research direction. A genome-scale metabolic model (GSM) for the maize root was developed to study its metabolic reprogramming under nitrogen stress conditions. The model was reconstructed based on the available information from KEGG, UniProt, and MaizeCyc. Transcriptomics data derived from the roots of hydroponically grown maize plants were used to incorporate regulatory constraints in the model and simulate nitrogen-non-limiting (N+) and nitrogen-deficient (N−) condition. Model-predicted flux-sum variability analysis achieved 70% accuracy compared with the experimental change of metabolite levels. In addition to predicting important metabolic reprogramming in central carbon, fatty acid, amino acid, and other secondary metabolism, maize root GSM predicted several metabolites (l-methionine, l-asparagine, l-lysine, cholesterol, and l-pipecolate) playing a regulatory role in the root biomass growth. Furthermore, this study revealed eight phosphatidylcholine and phosphatidylglycerol metabolites which, even though not coupled with biomass production, played a key role in the increased biomass production under N-deficient conditions. Overall, the omics-integrated GSM provides a promising tool to facilitate stress condition analysis for maize root and engineer better stress-tolerant maize genotypes.

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    Journal of Experimental Botany
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      Journal of Experimental Botany
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    Authors: David, Gilbert;

    Le présent article pose comme hypothèse principale qu’il existe une spécificité insulaire en matière de changement climatique, tant dans le domaine géopolitique que dans le domaine économique. A la différence des pays continentaux, le changement climatique est un facteur de structuration des États insulaires. Créée en 1990, 2 ans après que le GIEC commence ses travaux, l’Alliance des Petits États insulaires (AOSIS) s’est beaucoup investie dans la ratification du Protocole de Kyoto. Ces derniers se considèrent en effet comme les premières et principales victimes du changement climatique dont le coût pour leurs économies sera nettement plus élevé que celui supporté par les pays continentaux. Aux coûts directs, résultant de l’aléa naturel, notamment la montée du niveau de la mer et l’érosion du littoral qui lui est associée, se surimposeront des coûts induits par les mesures prises au niveau international pour lutter contre le changement climatique. Ces mesures conduisent à remettre la distance géographique au cœur de la logique de localisation des entreprises. La limitation des déplacements aériens et maritimes au long cours qui en résultera devrait entraîner une réduction de la demande mondiale pour les produits et services touristiques insulaires, suivie d’une concurrence exacerbée entre les îles pour attirer cette demande réduite. On assistera alors à la marginalisation des économies insulaires ne pouvant se positionner sur des marchés de niche aux échelles mondiales et régionales avec pour principaux corollaires l’exode rural et la migration internationale. Les recompositions économiques et territoriales qui s’annoncent sont des processus durables qui s’inscrivent dans le temps long. En revanche, le sommet de Copenhague a montré que la structuration politique des États insulaires sur la scène internationale est un processus fragile. L’AOSIS est sortie éclatée de ce sommet. L’avenir des îles est définitivement sous contrainte du changement climatique et il s’annonce bien sombre.

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    Authors: David, Gilbert;

    Le présent article pose comme hypothèse principale qu’il existe une spécificité insulaire en matière de changement climatique, tant dans le domaine géopolitique que dans le domaine économique. A la différence des pays continentaux, le changement climatique est un facteur de structuration des États insulaires. Créée en 1990, 2 ans après que le GIEC commence ses travaux, l’Alliance des Petits États insulaires (AOSIS) s’est beaucoup investie dans la ratification du Protocole de Kyoto. Ces derniers se considèrent en effet comme les premières et principales victimes du changement climatique dont le coût pour leurs économies sera nettement plus élevé que celui supporté par les pays continentaux. Aux coûts directs, résultant de l’aléa naturel, notamment la montée du niveau de la mer et l’érosion du littoral qui lui est associée, se surimposeront des coûts induits par les mesures prises au niveau international pour lutter contre le changement climatique. Ces mesures conduisent à remettre la distance géographique au cœur de la logique de localisation des entreprises. La limitation des déplacements aériens et maritimes au long cours qui en résultera devrait entraîner une réduction de la demande mondiale pour les produits et services touristiques insulaires, suivie d’une concurrence exacerbée entre les îles pour attirer cette demande réduite. On assistera alors à la marginalisation des économies insulaires ne pouvant se positionner sur des marchés de niche aux échelles mondiales et régionales avec pour principaux corollaires l’exode rural et la migration internationale. Les recompositions économiques et territoriales qui s’annoncent sont des processus durables qui s’inscrivent dans le temps long. En revanche, le sommet de Copenhague a montré que la structuration politique des États insulaires sur la scène internationale est un processus fragile. L’AOSIS est sortie éclatée de ce sommet. L’avenir des îles est définitivement sous contrainte du changement climatique et il s’annonce bien sombre.

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    Authors: Yang, Li-Na; orcid Ouyang, Haibing;
    Ouyang, Haibing
    ORCID
    Harvested from ORCID Public Data File

    Ouyang, Haibing in OpenAIRE
    orcid Nkurikiyimfura, Oswald;
    Nkurikiyimfura, Oswald
    ORCID
    Harvested from ORCID Public Data File

    Nkurikiyimfura, Oswald in OpenAIRE
    Fang, Hanmei; +4 Authors

    Effector genes, together with climatic and other environmental factors, play multifaceted roles in the development of plant diseases. Understanding the role of environmental factors, particularly climate conditions affecting the evolution of effector genes, is important for predicting the long-term value of the genes in controlling agricultural diseases. Here, we collected Phytophthora infestans populations from five locations along a mountainous hill in China and sequenced the effector gene Pi02860 from >300 isolates. To minimize the influence of other ecological factors, isolates were sampled from the same potato cultivar on the same day. We also expressed the gene to visualise its cellular location, assayed its pathogenicity and evaluated its response to experimental temperatures. We found that Pi02860 exhibited moderate genetic variation at the nucleotide level which was mainly generated by point mutation. The mutations did not change the cellular location of the effector gene but significantly modified the fitness of P. infestans. Genetic variation and pathogenicity of the effector gene were positively associated with the altitude of sample sites, possibly due to increased mutation rate induced by the vertical distribution of environmental factors such as UV radiation and temperature. We further found that Pi02860 expression was regulated by experimental temperature with reduced expression as experimental temperature increased. Together, these results indicate that UV radiation and temperature are important environmental factors regulating the evolution of effector genes and provide us with considerable insight as to their future sustainable action under climate and other environmental change.

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    Frontiers in Microbiology
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    Authors: Yang, Li-Na; orcid Ouyang, Haibing;
    Ouyang, Haibing
    ORCID
    Harvested from ORCID Public Data File

    Ouyang, Haibing in OpenAIRE
    orcid Nkurikiyimfura, Oswald;
    Nkurikiyimfura, Oswald
    ORCID
    Harvested from ORCID Public Data File

    Nkurikiyimfura, Oswald in OpenAIRE
    Fang, Hanmei; +4 Authors

    Effector genes, together with climatic and other environmental factors, play multifaceted roles in the development of plant diseases. Understanding the role of environmental factors, particularly climate conditions affecting the evolution of effector genes, is important for predicting the long-term value of the genes in controlling agricultural diseases. Here, we collected Phytophthora infestans populations from five locations along a mountainous hill in China and sequenced the effector gene Pi02860 from >300 isolates. To minimize the influence of other ecological factors, isolates were sampled from the same potato cultivar on the same day. We also expressed the gene to visualise its cellular location, assayed its pathogenicity and evaluated its response to experimental temperatures. We found that Pi02860 exhibited moderate genetic variation at the nucleotide level which was mainly generated by point mutation. The mutations did not change the cellular location of the effector gene but significantly modified the fitness of P. infestans. Genetic variation and pathogenicity of the effector gene were positively associated with the altitude of sample sites, possibly due to increased mutation rate induced by the vertical distribution of environmental factors such as UV radiation and temperature. We further found that Pi02860 expression was regulated by experimental temperature with reduced expression as experimental temperature increased. Together, these results indicate that UV radiation and temperature are important environmental factors regulating the evolution of effector genes and provide us with considerable insight as to their future sustainable action under climate and other environmental change.

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    Frontiers in Microbiology
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    Authors: orcid Lal, Aparna;
    Lal, Aparna
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    Lal, Aparna in OpenAIRE
    Lill, Adrian W.T.; Mcintyre, Mary; orcid Hales, Simon;
    Hales, Simon
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    Hales, Simon in OpenAIRE
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    To review the available evidence that examines the association between climatic and agricultural land use factors and the risks of enteric zoonoses in humans and consider information needs and possible pathways of intervention.The electronic databases PubMed, Web of Science and Embase and government websites were searched systematically for published literature that investigated the association of climatic and/or agricultural exposures with the incidence of the four most common enteric zoonotic diseases in New Zealand (campylobacteriosis, salmonellosis, cryptosporidiosis and giardiasis). Results The 16 studies in the review demonstrated significant associations between climate, agricultural land use and enteric disease occurrence. The evidence suggests that enteric disease risk from environmental reservoirs is pathogen specific. In some rural regions, environmental pathogen load is considerable, with multiple opportunities for zoonotic transmission.Enteric disease occurrence in NZ is associated with climate variability and agricultural land use. However, these relationships interact with demographic factors to influence disease patterns.Improved understanding of how environmental and social factors interact can inform effective public health interventions under scenarios of projected environmental change.

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    https://doi.org/10.1111/1753-6...
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    Authors: orcid Lal, Aparna;
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    Lill, Adrian W.T.; Mcintyre, Mary; orcid Hales, Simon;
    Hales, Simon
    ORCID
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    Hales, Simon in OpenAIRE
    +2 Authors

    To review the available evidence that examines the association between climatic and agricultural land use factors and the risks of enteric zoonoses in humans and consider information needs and possible pathways of intervention.The electronic databases PubMed, Web of Science and Embase and government websites were searched systematically for published literature that investigated the association of climatic and/or agricultural exposures with the incidence of the four most common enteric zoonotic diseases in New Zealand (campylobacteriosis, salmonellosis, cryptosporidiosis and giardiasis). Results The 16 studies in the review demonstrated significant associations between climate, agricultural land use and enteric disease occurrence. The evidence suggests that enteric disease risk from environmental reservoirs is pathogen specific. In some rural regions, environmental pathogen load is considerable, with multiple opportunities for zoonotic transmission.Enteric disease occurrence in NZ is associated with climate variability and agricultural land use. However, these relationships interact with demographic factors to influence disease patterns.Improved understanding of how environmental and social factors interact can inform effective public health interventions under scenarios of projected environmental change.

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    https://doi.org/10.1111/1753-6...
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    Authors: /Gilles, Sylvain; Fargier, L.; /Lazzaro, Xavier; orcid /Baras, Etienne;
    /Baras, Etienne
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    /Baras, Etienne in OpenAIRE
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    Integrated Multi-Trophic Aquaculture takes advantage of the mutualism between some detritivorous fish and phytoplankton. The fish recycle nutrients by consuming live (and dead) algae and provide the inorganic carbon to fuel the growth of live algae. In the meanwhile, algae purify the water and generate the oxygen required by fishes. Such mechanism stabilizes the functioning of an artificially recycling ecosystem, as exemplified by combining the euryhaline tilapia Sarotherodon melanotheron heudelotii and the unicellular alga Chlorella sp. Feed addition in this ecosystem results in faster fish growth but also in an increase in phytoplankton biomass, which must be limited. In the prototype described here, the algal population control is exerted by herbivorous zooplankton growing in a separate pond connected in parallel to the fish-algae ecosystem. The zooplankton production is then consumed by tilapia, particularly by the fry and juveniles, when water is returned to the main circuit. Chlorella sp. and Brachionus plicatilis are two planktonic species that have spontaneously colonized the brackish water of the prototype, which was set-up in Senegal along the Atlantic Ocean shoreline. In our system, water was entirely recycled and only evaporation was compensated (1.5% volume/day). Sediment, which accumulated in the zooplankton pond, was the only trophic cul-de-sac. The system was temporarily destabilized following an accidental rotifer invasion in the main circuit. This caused Chlorella disappearance and replacement by opportunist algae, not consumed by Brachionus. Following the entire consumption of the Brachionus population by tilapias, Chlorella predominated again. Our artificial ecosystem combining S. m. heudelotii, Chlorella and B. plicatilis thus appeared to be resilient. This farming system was operated over one year with a fish productivity of 1.85 kg/m2 per year during the cold season (January to April).

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    Animal
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      Article . 2013
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    Authors: /Gilles, Sylvain; Fargier, L.; /Lazzaro, Xavier; orcid /Baras, Etienne;
    /Baras, Etienne
    ORCID
    Harvested from ORCID Public Data File

    /Baras, Etienne in OpenAIRE
    +5 Authors

    Integrated Multi-Trophic Aquaculture takes advantage of the mutualism between some detritivorous fish and phytoplankton. The fish recycle nutrients by consuming live (and dead) algae and provide the inorganic carbon to fuel the growth of live algae. In the meanwhile, algae purify the water and generate the oxygen required by fishes. Such mechanism stabilizes the functioning of an artificially recycling ecosystem, as exemplified by combining the euryhaline tilapia Sarotherodon melanotheron heudelotii and the unicellular alga Chlorella sp. Feed addition in this ecosystem results in faster fish growth but also in an increase in phytoplankton biomass, which must be limited. In the prototype described here, the algal population control is exerted by herbivorous zooplankton growing in a separate pond connected in parallel to the fish-algae ecosystem. The zooplankton production is then consumed by tilapia, particularly by the fry and juveniles, when water is returned to the main circuit. Chlorella sp. and Brachionus plicatilis are two planktonic species that have spontaneously colonized the brackish water of the prototype, which was set-up in Senegal along the Atlantic Ocean shoreline. In our system, water was entirely recycled and only evaporation was compensated (1.5% volume/day). Sediment, which accumulated in the zooplankton pond, was the only trophic cul-de-sac. The system was temporarily destabilized following an accidental rotifer invasion in the main circuit. This caused Chlorella disappearance and replacement by opportunist algae, not consumed by Brachionus. Following the entire consumption of the Brachionus population by tilapias, Chlorella predominated again. Our artificial ecosystem combining S. m. heudelotii, Chlorella and B. plicatilis thus appeared to be resilient. This farming system was operated over one year with a fish productivity of 1.85 kg/m2 per year during the cold season (January to April).

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    Other literature type . 2013
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      Other literature type . 2013
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Authors: Glato Kodjo; Atsou Aïdam; orcid Ndjido Ardo Kane;
    Ndjido Ardo Kane
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    Ndjido Ardo Kane in OpenAIRE
    Diallo Bassirou; +5 Authors

    L'agriculture subsaharienne a été identifiée comme vulnérable au changement climatique en cours. L'adaptation de l'agriculture a été suggérée comme un moyen de maintenir la productivité. Une meilleure connaissance de la diversité intra-spécifique des variétés est une condition préalable à la bonne gestion de cette adaptation. Parmi les cultures, les racines et les tubercules jouent un rôle important dans la sécurité alimentaire et la croissance économique des populations les plus vulnérables d'Afrique. Ici, nous nous concentrons sur la patate douce. La patate douce (Ipomoea batatas) a été domestiquée en Amérique centrale et en Amérique du Sud et a ensuite été introduite en Afrique et est maintenant cultivée dans toute l'Afrique tropicale. Nous avons évalué sa diversité en Afrique de l'Ouest en échantillonnant une région s'étendant de la zone côtière du Togo à la région septentrionale sahélienne du Sénégal qui représente une gamme de conditions climatiques. À l'aide de 12 marqueurs microsatellites, nous avons évalué 132 variétés le long de ce gradient. Des données phénotypiques issues d'essais sur le terrain menés en trois saisons ont également été obtenues. La diversité génétique en Afrique de l'Ouest s'est avérée inférieure de 18 % à celle des États-Unis. La diversité génétique en Afrique de l'Ouest est structurée en cinq groupes, certains groupes se trouvant dans des zones climatiques très spécifiques, par exemple sous un climat tropical humide ou sous un climat sahélien. Nous avons également observé des groupes génétiques qui se produisent dans un plus large éventail de climats. Les groupes génétiques ont également été associés à la différenciation morphologique, principalement la forme des feuilles et la couleur de la tige ou de la racine. Cette structure particulière de la diversité le long d'un gradient climatique avec association à la variabilité phénotypique peut être utilisée pour des stratégies de conservation. S'il s'avère qu'une telle structure est associée à une adaptation climatique spécifique, elle permettra également de développer des stratégies pour adapter l'agriculture aux variations climatiques en cours en Afrique de l'Ouest. La agricultura subsahariana ha sido identificada como vulnerable al cambio climático en curso. Se ha sugerido la adaptación de la agricultura como una forma de mantener la productividad. Un mejor conocimiento de la diversidad intraespecífica de variedades es un requisito previo para el manejo exitoso de dicha adaptación. Entre los cultivos, la raíz y los tubérculos desempeñan un papel importante en la seguridad alimentaria y el crecimiento económico de las poblaciones más vulnerables de África. Aquí, nos centramos en la batata. La batata (Ipomoea batatas) se domesticó en América Central y del Sur y más tarde se introdujo en África y ahora se cultiva en toda el África tropical. Evaluamos su diversidad en África Occidental mediante el muestreo de una región que se extiende desde la zona costera de Togo hasta la región septentrional del Sahel en Senegal y que representa una variedad de condiciones climáticas. Utilizando 12 marcadores de microsatélites, evaluamos 132 variedades a lo largo de este gradiente. También se obtuvieron datos fenotípicos de ensayos de campo realizados en tres temporadas. Se encontró que la diversidad genética en África Occidental era un 18% menor que en América. La diversidad genética en África Occidental se estructura en cinco grupos, y algunos grupos se encuentran en áreas climáticas muy específicas, por ejemplo, en un clima tropical húmedo o en un clima saheliano. También observamos grupos genéticos que se producen en una gama más amplia de climas. Los grupos genéticos también se asociaron con la diferenciación morfológica, principalmente la forma de las hojas y el color del tallo o raíz. Esta estructura particular de diversidad a lo largo de un gradiente climático con asociación a la variabilidad fenotípica se puede utilizar para estrategias de conservación. Si se demuestra que dicha estructura está asociada con una adaptación climática específica, también permitirá desarrollar estrategias para adaptar la agricultura a la variación climática en curso en África Occidental. Sub-Saharan agriculture has been identified as vulnerable to ongoing climate change. Adaptation of agriculture has been suggested as a way to maintain productivity. Better knowledge of intra-specific diversity of varieties is prerequisites for the successful management of such adaptation. Among crops, root and tubers play important roles in food security and economic growth for the most vulnerable populations in Africa. Here, we focus on the sweet potato. The Sweet potato (Ipomoea batatas) was domesticated in Central and South America and was later introduced into Africa and is now cultivated throughout tropical Africa. We evaluated its diversity in West Africa by sampling a region extending from the coastal area of Togo to the northern Sahelian region of Senegal that represents a range of climatic conditions. Using 12 microsatellite markers, we evaluated 132 varieties along this gradient. Phenotypic data from field trials conducted in three seasons was also obtained. Genetic diversity in West Africa was found to be 18% lower than in America. Genetic diversity in West Africa is structured into five groups, with some groups found in very specific climatic areas, e.g. under a tropical humid climate, or under a Sahelian climate. We also observed genetic groups that occur in a wider range of climates. The genetic groups were also associated with morphological differentiation, mainly the shape of the leaves and the color of the stem or root. This particular structure of diversity along a climatic gradient with association to phenotypic variability can be used for conservation strategies. If such structure is proved to be associated with specific climatic adaptation, it will also allow developing strategies to adapt agriculture to ongoing climate variation in West Africa. تم تحديد الزراعة في جنوب الصحراء على أنها عرضة لتغير المناخ المستمر. تم اقتراح تكييف الزراعة كوسيلة للحفاظ على الإنتاجية. إن المعرفة الأفضل بتنوع الأصناف داخل الأنواع هو شرط أساسي للإدارة الناجحة لهذا التكيف. من بين المحاصيل، تلعب الجذور والدرنات أدوارًا مهمة في الأمن الغذائي والنمو الاقتصادي للفئات السكانية الأكثر ضعفًا في أفريقيا. هنا، نركز على البطاطا الحلوة. تم تدجين البطاطا الحلوة (إيبومويا باتاتاس) في أمريكا الوسطى والجنوبية وتم إدخالها لاحقًا إلى إفريقيا ويتم زراعتها الآن في جميع أنحاء إفريقيا الاستوائية. قمنا بتقييم تنوعها في غرب إفريقيا من خلال أخذ عينات من منطقة تمتد من المنطقة الساحلية لتوغو إلى منطقة الساحل الشمالي للسنغال التي تمثل مجموعة من الظروف المناخية. باستخدام 12 علامة للأقمار الصناعية الصغيرة، قمنا بتقييم 132 نوعًا على طول هذا التدرج. كما تم الحصول على بيانات النمط الظاهري من التجارب الميدانية التي أجريت في ثلاثة مواسم. وجد أن التنوع الوراثي في غرب إفريقيا أقل بنسبة 18 ٪ منه في أمريكا. ينقسم التنوع الوراثي في غرب أفريقيا إلى خمس مجموعات، حيث توجد بعض المجموعات في مناطق مناخية محددة للغاية، على سبيل المثال في ظل مناخ استوائي رطب، أو في ظل مناخ الساحل. لاحظنا أيضًا المجموعات الوراثية التي تحدث في مجموعة واسعة من المناخات. ارتبطت المجموعات الوراثية أيضًا بالتمايز المورفولوجي، بشكل أساسي شكل الأوراق ولون الجذع أو الجذر. يمكن استخدام هذا الهيكل الخاص للتنوع على طول التدرج المناخي مع الارتباط بالتغير الظاهري لاستراتيجيات الحفظ. إذا ثبت أن هذا الهيكل مرتبط بتكيف مناخي محدد، فسيسمح أيضًا بتطوير استراتيجيات لتكييف الزراعة مع التقلبات المناخية المستمرة في غرب إفريقيا.

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    Authors: Glato Kodjo; Atsou Aïdam; orcid Ndjido Ardo Kane;
    Ndjido Ardo Kane
    ORCID
    Harvested from ORCID Public Data File

    Ndjido Ardo Kane in OpenAIRE
    Diallo Bassirou; +5 Authors

    L'agriculture subsaharienne a été identifiée comme vulnérable au changement climatique en cours. L'adaptation de l'agriculture a été suggérée comme un moyen de maintenir la productivité. Une meilleure connaissance de la diversité intra-spécifique des variétés est une condition préalable à la bonne gestion de cette adaptation. Parmi les cultures, les racines et les tubercules jouent un rôle important dans la sécurité alimentaire et la croissance économique des populations les plus vulnérables d'Afrique. Ici, nous nous concentrons sur la patate douce. La patate douce (Ipomoea batatas) a été domestiquée en Amérique centrale et en Amérique du Sud et a ensuite été introduite en Afrique et est maintenant cultivée dans toute l'Afrique tropicale. Nous avons évalué sa diversité en Afrique de l'Ouest en échantillonnant une région s'étendant de la zone côtière du Togo à la région septentrionale sahélienne du Sénégal qui représente une gamme de conditions climatiques. À l'aide de 12 marqueurs microsatellites, nous avons évalué 132 variétés le long de ce gradient. Des données phénotypiques issues d'essais sur le terrain menés en trois saisons ont également été obtenues. La diversité génétique en Afrique de l'Ouest s'est avérée inférieure de 18 % à celle des États-Unis. La diversité génétique en Afrique de l'Ouest est structurée en cinq groupes, certains groupes se trouvant dans des zones climatiques très spécifiques, par exemple sous un climat tropical humide ou sous un climat sahélien. Nous avons également observé des groupes génétiques qui se produisent dans un plus large éventail de climats. Les groupes génétiques ont également été associés à la différenciation morphologique, principalement la forme des feuilles et la couleur de la tige ou de la racine. Cette structure particulière de la diversité le long d'un gradient climatique avec association à la variabilité phénotypique peut être utilisée pour des stratégies de conservation. S'il s'avère qu'une telle structure est associée à une adaptation climatique spécifique, elle permettra également de développer des stratégies pour adapter l'agriculture aux variations climatiques en cours en Afrique de l'Ouest. La agricultura subsahariana ha sido identificada como vulnerable al cambio climático en curso. Se ha sugerido la adaptación de la agricultura como una forma de mantener la productividad. Un mejor conocimiento de la diversidad intraespecífica de variedades es un requisito previo para el manejo exitoso de dicha adaptación. Entre los cultivos, la raíz y los tubérculos desempeñan un papel importante en la seguridad alimentaria y el crecimiento económico de las poblaciones más vulnerables de África. Aquí, nos centramos en la batata. La batata (Ipomoea batatas) se domesticó en América Central y del Sur y más tarde se introdujo en África y ahora se cultiva en toda el África tropical. Evaluamos su diversidad en África Occidental mediante el muestreo de una región que se extiende desde la zona costera de Togo hasta la región septentrional del Sahel en Senegal y que representa una variedad de condiciones climáticas. Utilizando 12 marcadores de microsatélites, evaluamos 132 variedades a lo largo de este gradiente. También se obtuvieron datos fenotípicos de ensayos de campo realizados en tres temporadas. Se encontró que la diversidad genética en África Occidental era un 18% menor que en América. La diversidad genética en África Occidental se estructura en cinco grupos, y algunos grupos se encuentran en áreas climáticas muy específicas, por ejemplo, en un clima tropical húmedo o en un clima saheliano. También observamos grupos genéticos que se producen en una gama más amplia de climas. Los grupos genéticos también se asociaron con la diferenciación morfológica, principalmente la forma de las hojas y el color del tallo o raíz. Esta estructura particular de diversidad a lo largo de un gradiente climático con asociación a la variabilidad fenotípica se puede utilizar para estrategias de conservación. Si se demuestra que dicha estructura está asociada con una adaptación climática específica, también permitirá desarrollar estrategias para adaptar la agricultura a la variación climática en curso en África Occidental. Sub-Saharan agriculture has been identified as vulnerable to ongoing climate change. Adaptation of agriculture has been suggested as a way to maintain productivity. Better knowledge of intra-specific diversity of varieties is prerequisites for the successful management of such adaptation. Among crops, root and tubers play important roles in food security and economic growth for the most vulnerable populations in Africa. Here, we focus on the sweet potato. The Sweet potato (Ipomoea batatas) was domesticated in Central and South America and was later introduced into Africa and is now cultivated throughout tropical Africa. We evaluated its diversity in West Africa by sampling a region extending from the coastal area of Togo to the northern Sahelian region of Senegal that represents a range of climatic conditions. Using 12 microsatellite markers, we evaluated 132 varieties along this gradient. Phenotypic data from field trials conducted in three seasons was also obtained. Genetic diversity in West Africa was found to be 18% lower than in America. Genetic diversity in West Africa is structured into five groups, with some groups found in very specific climatic areas, e.g. under a tropical humid climate, or under a Sahelian climate. We also observed genetic groups that occur in a wider range of climates. The genetic groups were also associated with morphological differentiation, mainly the shape of the leaves and the color of the stem or root. This particular structure of diversity along a climatic gradient with association to phenotypic variability can be used for conservation strategies. If such structure is proved to be associated with specific climatic adaptation, it will also allow developing strategies to adapt agriculture to ongoing climate variation in West Africa. تم تحديد الزراعة في جنوب الصحراء على أنها عرضة لتغير المناخ المستمر. تم اقتراح تكييف الزراعة كوسيلة للحفاظ على الإنتاجية. إن المعرفة الأفضل بتنوع الأصناف داخل الأنواع هو شرط أساسي للإدارة الناجحة لهذا التكيف. من بين المحاصيل، تلعب الجذور والدرنات أدوارًا مهمة في الأمن الغذائي والنمو الاقتصادي للفئات السكانية الأكثر ضعفًا في أفريقيا. هنا، نركز على البطاطا الحلوة. تم تدجين البطاطا الحلوة (إيبومويا باتاتاس) في أمريكا الوسطى والجنوبية وتم إدخالها لاحقًا إلى إفريقيا ويتم زراعتها الآن في جميع أنحاء إفريقيا الاستوائية. قمنا بتقييم تنوعها في غرب إفريقيا من خلال أخذ عينات من منطقة تمتد من المنطقة الساحلية لتوغو إلى منطقة الساحل الشمالي للسنغال التي تمثل مجموعة من الظروف المناخية. باستخدام 12 علامة للأقمار الصناعية الصغيرة، قمنا بتقييم 132 نوعًا على طول هذا التدرج. كما تم الحصول على بيانات النمط الظاهري من التجارب الميدانية التي أجريت في ثلاثة مواسم. وجد أن التنوع الوراثي في غرب إفريقيا أقل بنسبة 18 ٪ منه في أمريكا. ينقسم التنوع الوراثي في غرب أفريقيا إلى خمس مجموعات، حيث توجد بعض المجموعات في مناطق مناخية محددة للغاية، على سبيل المثال في ظل مناخ استوائي رطب، أو في ظل مناخ الساحل. لاحظنا أيضًا المجموعات الوراثية التي تحدث في مجموعة واسعة من المناخات. ارتبطت المجموعات الوراثية أيضًا بالتمايز المورفولوجي، بشكل أساسي شكل الأوراق ولون الجذع أو الجذر. يمكن استخدام هذا الهيكل الخاص للتنوع على طول التدرج المناخي مع الارتباط بالتغير الظاهري لاستراتيجيات الحفظ. إذا ثبت أن هذا الهيكل مرتبط بتكيف مناخي محدد، فسيسمح أيضًا بتطوير استراتيجيات لتكييف الزراعة مع التقلبات المناخية المستمرة في غرب إفريقيا.

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    PLoS ONE
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    Horizon / Pleins textes
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    https://dx.doi.org/10.60692/w7...
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    Authors: Jemimah Njuki; orcid bw Sarah Eissler;
    Sarah Eissler
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    Sarah Eissler in OpenAIRE
    orcid Hazel Malapit;
    Hazel Malapit
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    Hazel Malapit in OpenAIRE
    orcid Ruth Meinzen-Dick;
    Ruth Meinzen-Dick
    ORCID
    Harvested from ORCID Public Data File

    Ruth Meinzen-Dick in OpenAIRE
    +2 Authors

    AbstractAchieving gender equality and women’s empowerment in food systems can result in greater food security and better nutrition, as well as more just, resilient and sustainable food systems for all. This chapter uses a scoping review to assess the current evidence on pathways between gender equality, women’s empowerment and food systems. The chapter uses an adaptation of the food system framework to organize the evidence and identify where evidence is strong, and where gaps remain. Results show strong evidence on women’s differing access to resources, shaped and reinforced by contextual social gender norms, and on links between women’s empowerment and maternal education and important outcomes, such as nutrition and dietary diversity. However, evidence is limited on issues such as gender considerations in food systems for women in urban areas and in aquaculture value chains, best practices and effective pathways for engaging men in the process of women’s empowerment in food systems, and how to address issues related to migration, crises and indigenous food systems. While there are gender-informed evaluation studies examining the effectiveness of gender- and nutrition-sensitive agricultural programs, evidence indicating the long-term sustainability of such impacts remains limited. The chapter recommends key areas for investment: improving women’s leadership and decision-making in food systems, promoting equal and positive gender norms, improving access to resources, and building cross-contextual research evidence on gender and food systems.

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    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2023 . Peer-reviewed
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    Global Food Security
    Article . 2022 . Peer-reviewed
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    SSRN Electronic Journal
    Article . 2021 . Peer-reviewed
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    https://dx.doi.org/10.60692/pz...
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      https://doi.org/10.1007/978-3-...
      Part of book or chapter of book . 2023 . Peer-reviewed
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      Global Food Security
      Article . 2022 . Peer-reviewed
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      SSRN Electronic Journal
      Article . 2021 . Peer-reviewed
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      https://dx.doi.org/10.60692/pz...
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    Authors: Jemimah Njuki; orcid bw Sarah Eissler;
    Sarah Eissler
    ORCID
    Derived by OpenAIRE algorithms or harvested from 3rd party repositories

    Sarah Eissler in OpenAIRE
    orcid Hazel Malapit;
    Hazel Malapit
    ORCID
    Harvested from ORCID Public Data File

    Hazel Malapit in OpenAIRE
    orcid Ruth Meinzen-Dick;
    Ruth Meinzen-Dick
    ORCID
    Harvested from ORCID Public Data File

    Ruth Meinzen-Dick in OpenAIRE
    +2 Authors

    AbstractAchieving gender equality and women’s empowerment in food systems can result in greater food security and better nutrition, as well as more just, resilient and sustainable food systems for all. This chapter uses a scoping review to assess the current evidence on pathways between gender equality, women’s empowerment and food systems. The chapter uses an adaptation of the food system framework to organize the evidence and identify where evidence is strong, and where gaps remain. Results show strong evidence on women’s differing access to resources, shaped and reinforced by contextual social gender norms, and on links between women’s empowerment and maternal education and important outcomes, such as nutrition and dietary diversity. However, evidence is limited on issues such as gender considerations in food systems for women in urban areas and in aquaculture value chains, best practices and effective pathways for engaging men in the process of women’s empowerment in food systems, and how to address issues related to migration, crises and indigenous food systems. While there are gender-informed evaluation studies examining the effectiveness of gender- and nutrition-sensitive agricultural programs, evidence indicating the long-term sustainability of such impacts remains limited. The chapter recommends key areas for investment: improving women’s leadership and decision-making in food systems, promoting equal and positive gender norms, improving access to resources, and building cross-contextual research evidence on gender and food systems.

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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2023 . Peer-reviewed
    License: CC BY
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Global Food Security
    Article . 2022 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
    SSRN Electronic Journal
    Article . 2021 . Peer-reviewed
    Data sources: Crossref
    https://dx.doi.org/10.60692/pz...
    Other literature type . 2023
    Data sources: Datacite
    https://dx.doi.org/10.60692/gv...
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      https://doi.org/10.1007/978-3-...
      Part of book or chapter of book . 2023 . Peer-reviewed
      License: CC BY
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      Global Food Security
      Article . 2022 . Peer-reviewed
      License: CC BY
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      SSRN Electronic Journal
      Article . 2021 . Peer-reviewed
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      https://dx.doi.org/10.60692/pz...
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: orcid Lecourieux, Fatma;
    Lecourieux, Fatma
    ORCID
    Harvested from ORCID Public Data File

    Lecourieux, Fatma in OpenAIRE
    orcid Kappel, Christian;
    Kappel, Christian
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    Kappel, Christian in OpenAIRE
    orcid bw Pieri, Philippe;
    Pieri, Philippe
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    Pieri, Philippe in OpenAIRE
    orcid Charon, Justine;
    Charon, Justine
    ORCID
    Harvested from ORCID Public Data File

    Charon, Justine in OpenAIRE
    +6 Authors

    Reproductive development of grapevine and berry composition are both strongly influenced by temperature. To date, the molecular mechanisms involved in grapevine berries response to high temperatures are poorly understood. Unlike recent data that addressed the effects on berry development of elevated temperatures applied at the whole plant level, the present work particularly focuses on the fruit responses triggered by direct exposure to heat treatment (HT). In the context of climate change, this work focusing on temperature effect at the microclimate level is of particular interest as it can help to better understand the consequences of leaf removal (a common viticultural practice) on berry development. HT (+ 8°C) was locally applied to clusters from Cabernet Sauvignon fruiting cuttings at three different developmental stages (middle green, veraison and middle ripening). Samples were collected 1, 7, and 14 days after treatment and used for metabolic and transcriptomic analyses. The results showed dramatic and specific biochemical and transcriptomic changes in heat exposed berries, depending on the developmental stage and the stress duration. When applied at the herbaceous stage, HT delayed the onset of veraison. Heating also strongly altered the berry concentration of amino acids and organic acids (e.g., phenylalanine, γ-aminobutyric acid and malate) and decreased the anthocyanin content at maturity. These physiological alterations could be partly explained by the deep remodeling of transcriptome in heated berries. More than 7000 genes were deregulated in at least one of the nine experimental conditions. The most affected processes belong to the categories "stress responses," "protein metabolism" and "secondary metabolism," highlighting the intrinsic capacity of grape berries to perceive HT and to build adaptive responses. Additionally, important changes in processes related to "transport," "hormone" and "cell wall" might contribute to the postponing of veraison. Finally, opposite effects depending on heating duration were observed for genes encoding enzymes of the general phenylpropanoid pathway, suggesting that the HT-induced decrease in anthocyanin content may result from a combination of transcript abundance and product degradation.

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    Frontiers in Plant Science
    Article . 2017 . Peer-reviewed
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    Frontiers in Plant Science
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    PubMed Central
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    ProdInra
    Article . 2017
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    HAL INRAE
    Article . 2017
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    HAL INRAE
    Article . 2017
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      Frontiers in Plant Science
      Article . 2017 . Peer-reviewed
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      Frontiers in Plant Science
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      PubMed Central
      Other literature type . 2017
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      Data sources: PubMed Central
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      ProdInra
      Article . 2017
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      Article . 2017
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      Article . 2017
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: orcid Lecourieux, Fatma;
    Lecourieux, Fatma
    ORCID
    Harvested from ORCID Public Data File

    Lecourieux, Fatma in OpenAIRE
    orcid Kappel, Christian;
    Kappel, Christian
    ORCID
    Harvested from ORCID Public Data File

    Kappel, Christian in OpenAIRE
    orcid bw Pieri, Philippe;
    Pieri, Philippe
    ORCID
    Derived by OpenAIRE algorithms or harvested from 3rd party repositories

    Pieri, Philippe in OpenAIRE
    orcid Charon, Justine;
    Charon, Justine
    ORCID
    Harvested from ORCID Public Data File

    Charon, Justine in OpenAIRE
    +6 Authors

    Reproductive development of grapevine and berry composition are both strongly influenced by temperature. To date, the molecular mechanisms involved in grapevine berries response to high temperatures are poorly understood. Unlike recent data that addressed the effects on berry development of elevated temperatures applied at the whole plant level, the present work particularly focuses on the fruit responses triggered by direct exposure to heat treatment (HT). In the context of climate change, this work focusing on temperature effect at the microclimate level is of particular interest as it can help to better understand the consequences of leaf removal (a common viticultural practice) on berry development. HT (+ 8°C) was locally applied to clusters from Cabernet Sauvignon fruiting cuttings at three different developmental stages (middle green, veraison and middle ripening). Samples were collected 1, 7, and 14 days after treatment and used for metabolic and transcriptomic analyses. The results showed dramatic and specific biochemical and transcriptomic changes in heat exposed berries, depending on the developmental stage and the stress duration. When applied at the herbaceous stage, HT delayed the onset of veraison. Heating also strongly altered the berry concentration of amino acids and organic acids (e.g., phenylalanine, γ-aminobutyric acid and malate) and decreased the anthocyanin content at maturity. These physiological alterations could be partly explained by the deep remodeling of transcriptome in heated berries. More than 7000 genes were deregulated in at least one of the nine experimental conditions. The most affected processes belong to the categories "stress responses," "protein metabolism" and "secondary metabolism," highlighting the intrinsic capacity of grape berries to perceive HT and to build adaptive responses. Additionally, important changes in processes related to "transport," "hormone" and "cell wall" might contribute to the postponing of veraison. Finally, opposite effects depending on heating duration were observed for genes encoding enzymes of the general phenylpropanoid pathway, suggesting that the HT-induced decrease in anthocyanin content may result from a combination of transcript abundance and product degradation.

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    Frontiers in Plant Science
    Article . 2017 . Peer-reviewed
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    Frontiers in Plant Science
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    PubMed Central
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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      Frontiers in Plant Science
      Article . 2017 . Peer-reviewed
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      Frontiers in Plant Science
      Article
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      PubMed Central
      Other literature type . 2017
      License: CC BY
      Data sources: PubMed Central
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      ProdInra
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      Article . 2017
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      Article . 2017
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Calderon, M.; orcid Loiseau, Gérard;
    Loiseau, Gérard
    ORCID
    Harvested from ORCID Public Data File

    Loiseau, Gérard in OpenAIRE
    Guyot, Jean-Pierre;

    Glucose, fructose, sucrose and starch are naturally present in cereals. Fermentation of different combinations of these carbohydrates by Lactobacillus fermentum Ogi E1, a sourdough heterofermentative lactobacillus, was investigated to determine effects on fermentation kinetics, growth energetics and alpha-amylase production. Irrespective of the substrate combination, the strain was able to simultaneously produce alpha-amylase and consume starch, glucose, fructose and sucrose. In mixtures of starch with either sucrose or fructose or with both fructose and glucose, yields of alpha-amylase from biomass (Y(amy/x)) were similar to those observed for starch. However, for starch and glucose or starch, glucose, fructose and sucrose mixtures, both Y(amy/x) and the specific rate of alpha-amylase production decreased markedly. In fructose- or sucrose-containing mixtures, mannitol was formed stoichiometrically indicating that fructose served as electron acceptor, and acetate was produced at constant yield from biomass (Y(ac/x)) (1 g acetate g biomass(-1)). Acetate production was expected to confer to the strain a competitive advantage during natural fermentation by improving biomass formation and growth through an increase in the ATP gain. Y(ATP) varied depending on the carbohydrate mixture, indicating different effects of substrate mixtures on the efficiency in ATP coupling to biomass formation. Compared to starch fermentation, the highest value of Y(ATP) (29 g biomass mol ATP(-1)) was estimated for the starch/fructose mixture but no increase in mu(max) was observed. The lowest value (16 g biomass mol ATP(-1)) was obtained for the starch, glucose and fructose mixture, whereas for the mixture of all carbohydrates, Y(ATP) was similar to that obtained with starch alone (20 g biomass mol ATP(-1)) and it was intermediary for the starch and sucrose mixture (17 g biomass mol ATP(-1)). It is concluded that competitiveness of the strain cannot be based on expected energy gain in mixed substrate fermentation involving fructose and sucrose with glucose and starch, but rather on its ability to simultaneously use carbohydrates while producing alpha-amylase and to produce acetic acid. Acetic acid production could enhance the strain capacity to inhibit nonacid-tolerant, competitive microflora at the earlier stage of natural fermentation.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao International Journa...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    International Journal of Food Microbiology
    Article . 2003 . Peer-reviewed
    License: Elsevier TDM
    Data sources: Crossref
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Article . 2003
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao International Journa...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      International Journal of Food Microbiology
      Article . 2003 . Peer-reviewed
      License: Elsevier TDM
      Data sources: Crossref
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Authors: Calderon, M.; orcid Loiseau, Gérard;
    Loiseau, Gérard
    ORCID
    Harvested from ORCID Public Data File

    Loiseau, Gérard in OpenAIRE
    Guyot, Jean-Pierre;

    Glucose, fructose, sucrose and starch are naturally present in cereals. Fermentation of different combinations of these carbohydrates by Lactobacillus fermentum Ogi E1, a sourdough heterofermentative lactobacillus, was investigated to determine effects on fermentation kinetics, growth energetics and alpha-amylase production. Irrespective of the substrate combination, the strain was able to simultaneously produce alpha-amylase and consume starch, glucose, fructose and sucrose. In mixtures of starch with either sucrose or fructose or with both fructose and glucose, yields of alpha-amylase from biomass (Y(amy/x)) were similar to those observed for starch. However, for starch and glucose or starch, glucose, fructose and sucrose mixtures, both Y(amy/x) and the specific rate of alpha-amylase production decreased markedly. In fructose- or sucrose-containing mixtures, mannitol was formed stoichiometrically indicating that fructose served as electron acceptor, and acetate was produced at constant yield from biomass (Y(ac/x)) (1 g acetate g biomass(-1)). Acetate production was expected to confer to the strain a competitive advantage during natural fermentation by improving biomass formation and growth through an increase in the ATP gain. Y(ATP) varied depending on the carbohydrate mixture, indicating different effects of substrate mixtures on the efficiency in ATP coupling to biomass formation. Compared to starch fermentation, the highest value of Y(ATP) (29 g biomass mol ATP(-1)) was estimated for the starch/fructose mixture but no increase in mu(max) was observed. The lowest value (16 g biomass mol ATP(-1)) was obtained for the starch, glucose and fructose mixture, whereas for the mixture of all carbohydrates, Y(ATP) was similar to that obtained with starch alone (20 g biomass mol ATP(-1)) and it was intermediary for the starch and sucrose mixture (17 g biomass mol ATP(-1)). It is concluded that competitiveness of the strain cannot be based on expected energy gain in mixed substrate fermentation involving fructose and sucrose with glucose and starch, but rather on its ability to simultaneously use carbohydrates while producing alpha-amylase and to produce acetic acid. Acetic acid production could enhance the strain capacity to inhibit nonacid-tolerant, competitive microflora at the earlier stage of natural fermentation.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao International Journa...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    International Journal of Food Microbiology
    Article . 2003 . Peer-reviewed
    License: Elsevier TDM
    Data sources: Crossref
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Agritrop
    Article . 2003
    Data sources: Agritrop
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    34
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao International Journa...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      International Journal of Food Microbiology
      Article . 2003 . Peer-reviewed
      License: Elsevier TDM
      Data sources: Crossref
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Agritrop
      Article . 2003
      Data sources: Agritrop
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