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description Publicationkeyboard_double_arrow_right Article , Journal 2012 FinlandPublisher:Elsevier BV Tarja Lehto; Yang Cao; Yang Cao; Yang Cao; Paavo Pelkonen; Jussi V. K. Kukkonen; Sirpa Piirainen;Abstract Short rotation coppice (SRC) willow are established conventionally by inserting cuttings vertically into the soil, but their ability to reproduce vegetative has also been demonstrated by planting cuttings horizontally. There is a lack of knowledge about the biomass production, root characteristic, and nutrient leaching of plantations established through horizontally planted cuttings. A plot experiment was conducted to compare the soil solution chemistry and the growth of stem and roots of willow cuttings ( Salix schwerinii ) with vertical or horizontal planting orientation at two planting densities (corresponding to 7500 and 22,500 cuttings ha −1 ). The horizontally planted cuttings achieved the same stem yields (4.08 t ha −1 ) as the vertically planted cuttings (4.86 t ha −1 ). The stem biomass was doubled to a planting density of 22,500 cuttings ha −1 (6.34 t ha −1 ) compared to at 7500 cuttings ha −1 (3.36 t ha −1 ). The effect of planting orientation or density had no effect on the root biomass or production. Willows decreased the conductivity, (NO 2 +NO 3 )–N and the dissolved total N in the soil solution compared with unplanted plots, but the influence was not detected systematically at each sampling depth or in each year. The differences in soil water concentrations between planting treatments remained small. In conclusion, we have shown that both planting orientation methods, horizontal and vertical, can be used for preventing nutrient leaching and maximizing biomass production. It will also be interesting to expand the application of horizontally planted willow materials in order to stabilize slops, control erosion and reclaim contaminated sites.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.biombioe.2012.09.006&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu10 citations 10 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.biombioe.2012.09.006&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Journal 2021 Finland, FinlandPublisher:Oxford University Press (OUP) Funded by:AKA | Drivers of fine root phen..., AKA | Tree responses to soil fr...AKA| Drivers of fine root phenology of boreal trees in changing climate (RootPheno) ,AKA| Tree responses to soil frost and flooding in extreme wintersDomisch, Timo; Roitto, Marja; Kilpeläinen, Jouni; Wang, Ai-Fang; Piirainen, Sirpa; Heiskanen, Juha; Makita, Naoki; Lehto, Tarja; Sutinen; Sirkka; Repo, Tapani;Abstract Winter precipitation and soil freeze–thaw events have been predicted to increase in boreal regions with climate change. This may expose tree roots to waterlogging (WL) and soil freezing (Fr) more than in the current climate and therefore affect tree growth and survival. Using a whole-tree approach, we studied the responses of silver birch (Betula pendula Roth.) saplings, growing in mineral soil, to 6-week Fr and WL in factorial combinations during dormancy, with accompanying changes in soil gas concentrations. Physiological activation (dark-acclimated chlorophyll fluorescence and chlorophyll content index) and growth of leaves and shoot elongation and stem diameter growth started earlier in Fr than NoFr (soil not frozen). The starch content of leaves was temporarily higher in Fr than NoFr in the latter part of the growing season. Short and long root production and longevity decreased, and mortality increased by soil Fr, while there were no significant effects of WL. Increased fine root damage was followed by increased compensatory root growth. At the beginning of the growing season, stem sap flow increased fastest in Fr + WL, with some delay in both NoWL (without WL) treatments. At the end of the follow-up growing season, the hydraulic conductance and impedance loss factor of roots were higher in Fr than in NoFr, but there were no differences in above- and belowground biomasses. The concentration of soil carbon dioxide increased and methane decreased by soil Fr at the end of dormancy. At the beginning of the growing season, the concentration of nitrous oxide was higher in WL than in NoWL and higher in Fr than in NoFr. In general, soil Fr had more consistent effects on soil greenhouse gas concentrations than WL. To conclude, winter-time WL alone is not as harmful for roots as WL during the growing season.
Tree Physiology arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2021 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkiadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/treephys/tpab002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 6 citations 6 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Tree Physiology arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2021 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkiadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/treephys/tpab002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 FinlandPublisher:Elsevier BV Tarja Lehto; Tapani Repo; Olli-Pekka Tikkanen; Ana Mellado; Mai-He Li; Aino Hämäläinen; Ao Wang; Ao Wang; José A. Hódar; Jouni Kilpeläinen; Bogdan Jaroszewicz; Andreas Rigling; Andreas Rigling; Minna Luoto;Abstract The ability of plants to tolerate freezing limits their geographical distribution. Therefore, winter warming may shift a species’ occurrence northwards and/or to higher altitudes. In Europe, the hemiparasitic vascular plant Viscum album (mistletoe) has two common and widespread subspecies: V. a. ssp. album and V. a. ssp. austriacum. The former has a more northern geographic distribution than the latter. Therefore we hypothesised that seeds of V. a. ssp. album are more tolerant to freezing than those of V. a. ssp. austriacum. From these two mistletoe subspecies V. a. ssp. austriacum is, in some managed forest areas, considered a novel threat to tree growth and forest health. Berries of V. a. ssp. album were collected from Sweden, Poland and Switzerland and berries of V. a. ssp. austriacum were collected from Poland, Switzerland and Spain. After storage at −3 °C, seeds were extracted from the pulp of berries and exposed to eight different temperatures between −8 °C and −30 °C, with the storage temperature serving as the control. After freezing treatments, germination of seeds was monitored. In addition, differential thermal analysis was used to measure freeze tolerance of seeds. The seeds of V. a. ssp. album tolerated lower temperatures than seeds of V. a. ssp. austriacum. The temperature at which 50% of seeds lost their ability to germinate (LT50) was −15 °C in V. a. ssp. austriacum and between −15 °C and −19 °C in V. a. ssp. album. The results of differential thermal analysis to determine the freezing point of seeds supported these findings. The freezing tolerance of mistletoe seeds was relatively well coupled with the winter climate at the edge of their current geographic distribution. Based on our results, the warming of winters may eliminate the abiotic barrier that has thus far limited mistletoes’ expansion, opening a window of opportunity for these parasites to increase their abundance and shift their distribution range towards higher latitudes and altitudes. Although mistletoes play important ecological roles in forest ecosystems, their recent increase has raised concern among forest managers, because they may cause a substantial reduction in tree growth in single species dominated stands. Increasing tree species diversity might be an effective method for limiting future mass infestations in homogeneous managed forests.
UEF eRepository (Uni... arrow_drop_down UEF eRepository (University of Eastern Finland)Article . 2021License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)Forest Ecology and ManagementArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.foreco.2020.118806&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert UEF eRepository (Uni... arrow_drop_down UEF eRepository (University of Eastern Finland)Article . 2021License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)Forest Ecology and ManagementArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.foreco.2020.118806&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type , Preprint 2020 Sweden, Sweden, FinlandPublisher:Wiley Funded by:AKA | Centre of Excellence in M..., AKA | Acclimation of stomatal r...AKA| Centre of Excellence in Molecular Biology of Primary Producers ,AKA| Acclimation of stomatal responses to light: environmental cues, strategies and mechanismsAuthors: Andrew O’Hara; Luis Orlando Morales; Luis Orlando Morales; Khuanpiroon Ratanasopa; +12 AuthorsAndrew O’Hara; Luis Orlando Morales; Luis Orlando Morales; Khuanpiroon Ratanasopa; Neha Rai; Gareth I. Jenkins; Mikael Brosché; Anders V. Lindfors; Pedro J. Aphalo; Tarja Lehto; Omid Safronov; Åke Strid; Daniel Farkas; Jarkko Salojärvi; Jarkko Salojärvi; Fang Wang;AbstractThe photoreceptors UV RESISTANCE LOCUS 8 (UVR8) and CRYPTOCHROMES 1 and 2 (CRYs) play major roles in the perception of UV‐B (280–315 nm) and UV‐A/blue radiation (315–500 nm), respectively. However, it is poorly understood how they function in sunlight. The roles of UVR8 and CRYs were assessed in a factorial experiment with Arabidopsis thaliana wild‐type and photoreceptor mutants exposed to sunlight for 6 or 12 hr under five types of filters with cut‐offs in UV and blue‐light regions. Transcriptome‐wide responses triggered by UV‐B and UV‐A wavelengths shorter than 350 nm (UV‐Asw) required UVR8 whereas those induced by blue and UV‐A wavelengths longer than 350 nm (UV‐Alw) required CRYs. UVR8 modulated gene expression in response to blue light while lack of CRYs drastically enhanced gene expression in response to UV‐B and UV‐Asw. These results agree with our estimates of photons absorbed by these photoreceptors in sunlight and with in vitro monomerization of UVR8 by wavelengths up to 335 nm. Motif enrichment analysis predicted complex signaling downstream of UVR8 and CRYs. Our results highlight that it is important to use UV waveband definitions specific to plants' photomorphogenesis as is routinely done in the visible region.
bioRxiv arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2020 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkihttp://urn.kb.se/resolve?urn=u...Article . 2020 . Peer-reviewedData sources: Publikationer från Örebro universitetDigitala Vetenskapliga Arkivet - Academic Archive On-lineArticle . 2020 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/pce.13752&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 62 citations 62 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert bioRxiv arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2020 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkihttp://urn.kb.se/resolve?urn=u...Article . 2020 . Peer-reviewedData sources: Publikationer från Örebro universitetDigitala Vetenskapliga Arkivet - Academic Archive On-lineArticle . 2020 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/pce.13752&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Journal 2019 Germany, Germany, FinlandPublisher:Oxford University Press (OUP) Funded by:EC | EPPN2020, AKA | Centre of Excellence in M..., AKA | Acclimation of stomatal r...EC| EPPN2020 ,AKA| Centre of Excellence in Molecular Biology of Primary Producers ,AKA| Acclimation of stomatal responses to light: environmental cues, strategies and mechanismsNeha Rai; Susanne Neugart; Yan Yan; Fang Wang; Sari M Siipola; Anders V Lindfors; Jana Barbro Winkler; Andreas Albert; Mikael Brosché; Tarja Lehto; Luis O Morales; Pedro J Aphalo;AbstractCryptochromes (CRYs) and UV RESISTANCE LOCUS 8 (UVR8) photoreceptors perceive UV-A/blue (315–500 nm) and UV-B (280–315 nm) radiation in plants, respectively. While the roles of CRYs and UVR8 have been studied in separate controlled-environment experiments, little is known about the interaction between these photoreceptors. Here, Arabidopsis wild-type Ler, CRYs and UVR8 photoreceptor mutants (uvr8-2, cry1cry2 and cry1cry2uvr8-2), and a flavonoid biosynthesis-defective mutant (tt4) were grown in a sun simulator. Plants were exposed to filtered radiation for 17 d or for 6 h, to study the effects of blue, UV-A, and UV-B radiation. Both CRYs and UVR8 independently enabled growth and survival of plants under solar levels of UV, while their joint absence was lethal under UV-B. CRYs mediated gene expression under blue light. UVR8 mediated gene expression under UV-B radiation, and in the absence of CRYs, also under UV-A. This negative regulation of UVR8-mediated gene expression by CRYs was also observed for UV-B. The accumulation of flavonoids was also consistent with this interaction between CRYs and UVR8. In conclusion, we provide evidence for an antagonistic interaction between CRYs and UVR8 and a role of UVR8 in UV-A perception.
Journal of Experimen... arrow_drop_down Journal of Experimental BotanyArticle . 2019 . Peer-reviewedLicense: CC BY NCData sources: CrossrefHELDA - Digital Repository of the University of HelsinkiArticle . 2019 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiPublikationenserver der Georg-August-Universität GöttingenArticle . 2020Publication Server of Helmholtz Zentrum München (PuSH)Article . 2019Data sources: Publication Server of Helmholtz Zentrum München (PuSH)Journal of Experimental BotanyArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/jxb/erz236&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 68 citations 68 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Journal of Experimen... arrow_drop_down Journal of Experimental BotanyArticle . 2019 . Peer-reviewedLicense: CC BY NCData sources: CrossrefHELDA - Digital Repository of the University of HelsinkiArticle . 2019 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiPublikationenserver der Georg-August-Universität GöttingenArticle . 2020Publication Server of Helmholtz Zentrum München (PuSH)Article . 2019Data sources: Publication Server of Helmholtz Zentrum München (PuSH)Journal of Experimental BotanyArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/jxb/erz236&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019 Canada, FinlandPublisher:Canadian Science Publishing Kilpeläinen, Jouni; Domisch, Timo; Lehto, Tarja; Finér, Leena; Aphalo, Pedro J.; Leinonen, Ilkka; Ryyppö, Aija; Repo, Tapani;handle: 1807/96845
Tree roots comprise a huge carbon pool. Their dynamics are driven by environmental factors and thereby affected by climate change. We studied the effects of soil temperature on root and shoot phenology and their linkages in Norway spruce (Picea abies (L.) Karst.). Saplings were grown in controlled-environment rooms for three simulated growing seasons (GS1, GS2, and GS3). Soil-temperature treatments of 9, 13, 18, and 21 °C were applied during GS2. Root growth was monitored with minirhizotrons and commenced in all treatments simultaneously. Temporal growth patterns of short and long roots were usually bimodal. Root growth was very low during the coldest treatment of GS2 but increased during GS3 as an aftereffect. During GS3, growth of short roots continued later after colder treatments than warmer treatments. Reduced sink strength of roots and increased carbohydrate accumulation into needles at 9 °C during GS2 probably enabled compensatory root growth under restored temperatures during GS3. Soil temperature did not affect shoot phenology, and root and shoot phenology varied between growing seasons; thus, the linkage of root and shoot phenology was inconsistent. In warmer soil, root longevity was shorter and turnover rate was higher than in colder soil. This can further affect soil carbon dynamics and ecosystem carbon cycling in boreal forest ecosystems.
Canadian Journal of ... arrow_drop_down University of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaCanadian Journal of Forest ResearchArticle . 2019 . Peer-reviewedLicense: CSP TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1139/cjfr-2019-0190&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 8 citations 8 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Canadian Journal of ... arrow_drop_down University of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaCanadian Journal of Forest ResearchArticle . 2019 . Peer-reviewedLicense: CSP TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1139/cjfr-2019-0190&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2013 France, FinlandPublisher:Springer Science and Business Media LLC Funded by:AKA | Tree responses to soil fr...AKA| Tree responses to soil frost and flooding in extreme wintersTarja Lehto; Tapani Repo; Monica Calvo-Polanco; Janusz J. Zwiazek; Marja Roitto; Ai-Fang Wang; Ai-Fang Wang;Waterlogging is predicted to become more common in boreal forests during winter and early spring with climate change. So far, little is known about the waterlogging tolerance of boreal tree species during their winter dormancy. The aim was to quantify the degree of waterlogging tolerance of 1-year-old dormant Norway spruce (Picea abies (L.) Karst.) seedlings. The seedlings were exposed to waterlogging in a growth chamber at temperature of 2 °C for 4 weeks and then allowed to recover for 6 weeks during the growth stage. Shoot and root responses were monitored by physiological and growth measurements. No effect was found in the seedling biomass, but root mortality increased slightly during the early growth stage following waterlogging. The water potential of the needles became less negative at the end of the waterlogging and the early growth stage. The ratio of apoplastic to symplastic electrical resistance (R e/R i) of the needles was lower after waterlogging, indicating changes in the proportions of symplastic and apoplastic space. No differences were found between the treatments in the dark-acclimated chlorophyll fluorescence (F v/F m) of the needles. Slightly greater accumulation of starch and temporary reductions of some mineral nutrients in needles were found after waterlogging. We conclude that in late winter and early spring, Norway spruce seedlings potentially tolerate short periods of waterlogging.
Hyper Article en Lig... arrow_drop_down INRIA a CCSD electronic archive serverArticle . 2013Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s13595-013-0325-5&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 17 citations 17 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Hyper Article en Lig... arrow_drop_down INRIA a CCSD electronic archive serverArticle . 2013Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s13595-013-0325-5&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2014 FinlandPublisher:Springer Science and Business Media LLC Funded by:AKA | Tree responses to soil fr..., AKA | Mycorrhizas in ecosystems...AKA| Tree responses to soil frost and flooding in extreme winters ,AKA| Mycorrhizas in ecosystems revisited: Climatic and nutritional determinants of success for mycorrhiza typesAuthors: Korhonen, Anna; Lehto, Tarja; Repo, Tapani;pmid: 25404213
Survival and functioning of mycorrhizal associations at low temperatures are not known well. In an earlier study, ectomycorrhizas did not affect the frost hardiness of Scots pine (Pinus sylvestris L.) roots, but here we studied whether differential nutrient availability would change the result and additionally, alter frost hardiness aboveground. The aim in this experiment was to compare the frost hardiness of roots and needles of mycorrhizal (Hebeloma sp.) and non-mycorrhizal Scots pine seedlings raised using two fertilization treatments and two cold-hardening regimes. The fertilization treatments were low (LF) and high (HF) application of a complete nutrient solution. Three hundred mycorrhizal and non-mycorrhizal seedlings were cultivated in growth chambers in four blocks for 16 weeks. For the first 9 weeks, the seedlings grew in long-day and high-temperature (LDHT) with low fertilization and then they were raised for 3 weeks in LDHT with either low or high fertilization. After this, half of the plants in each treatment combination remained in LDHT, and half were transferred to short-day and low-temperature (SDLT) conditions to cold acclimatize. The frost hardiness of the roots and needles was assessed using controlled freezing tests followed by electrolyte leakage tests (REL). Mycorrhizal roots were slightly more frost hardy than non-mycorrhizal roots, but only in the growing-season conditions (LDHT) in low-nutrient treatment. In LDHT and LF, the frost hardiness of the non-mycorrhizal roots was about -9 °C, and that of the non-mycorrhizal HF roots and the mycorrhizal roots in both fertilization levels was about -11 °C. However, no difference was found in the roots within the SDLT regime, and in needles, there was no difference between mycorrhizal and fertilization treatments. The frost hardiness of needles increased by SDLT treatment, being -8.5 and -14.1 °C in LDHT and SDLT, respectively. The dry mass of roots, stems, and needles was lower in LF than in HF and lower in SDLT than in LDHT. Mycorrhizal treatment did not affect the dry mass or its allocation. Although the mycorrhizal roots were slightly more frost hardy in the growing-season conditions, this is not likely to have significance in the field.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s00572-014-0618-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu7 citations 7 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2017 FinlandPublisher:Oxford University Press (OUP) Wang, Ai-Fang; Roitto, Marja; Lehto, Tarja; Sutinen, Sirkka; Heinonen, Jaakko; Zhang, Gang; Repo, Tapani;pmid: 28338895
Increased risk of soil waterlogging in winter and spring at northern latitudes will potentially affect forest production in the future. We studied gas exchange, chlorophyll content index, chlorophyll fluorescence, nutrient concentration and biomass accumulation in 1-year-old silver (Betula pendula Roth) and pubescent birch (Betula pubescens Ehrh.) seedlings. We hypothesized that B. pubescens has different physiological mechanisms that make it tolerate waterlogging better than B. pendula. The treatments were: (i) no waterlogging throughout the experiment; (ii) 4-week waterlogging during dormancy (dormancy waterlogging 'DW'); (iii) 4-week waterlogging during the early growing season (growth waterlogging 'GW'); and (iv) 4-week DW followed by 4-week GW during the early growing season ('DWGW'). Stomatal conductance and light-saturated net assimilation rate were reduced by GW in both species, and in B. pubescens also by DW. However, recovery was seen during the follow-up growing season. In B. pendula, DW, GW and DWGW temporarily resulted in reduced stem biomass, and GW and DWGW caused reduced leaf biomass. In B. pubescens, the stem biomass was decreased in GW and DWGW. Leaf nitrogen (N) and phosphorus (P) concentrations were generally low, and increased by GW, while potassium, calcium, magnesium and to some extent, boron and zinc concentrations decreased in both species and additionally manganese in B. pendula. The increases in N and P are mostly due to a concentration effect due to smaller leaf biomass, yet suggest that their uptake was not impaired. The decreases in cation concentrations are likely to be connected to impaired root functioning, which was not yet fully recovered from GW. We conclude that morphological acclimation to waterlogging of the leaves and roots rather than photosynthesis explains why B. pubescens is able to grow better in wetter areas than B. pendula.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/treephys/tpx021&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 16 citations 16 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/treephys/tpx021&type=result"></script>'); --> </script>
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description Publicationkeyboard_double_arrow_right Article , Journal 2012 FinlandPublisher:Elsevier BV Tarja Lehto; Yang Cao; Yang Cao; Yang Cao; Paavo Pelkonen; Jussi V. K. Kukkonen; Sirpa Piirainen;Abstract Short rotation coppice (SRC) willow are established conventionally by inserting cuttings vertically into the soil, but their ability to reproduce vegetative has also been demonstrated by planting cuttings horizontally. There is a lack of knowledge about the biomass production, root characteristic, and nutrient leaching of plantations established through horizontally planted cuttings. A plot experiment was conducted to compare the soil solution chemistry and the growth of stem and roots of willow cuttings ( Salix schwerinii ) with vertical or horizontal planting orientation at two planting densities (corresponding to 7500 and 22,500 cuttings ha −1 ). The horizontally planted cuttings achieved the same stem yields (4.08 t ha −1 ) as the vertically planted cuttings (4.86 t ha −1 ). The stem biomass was doubled to a planting density of 22,500 cuttings ha −1 (6.34 t ha −1 ) compared to at 7500 cuttings ha −1 (3.36 t ha −1 ). The effect of planting orientation or density had no effect on the root biomass or production. Willows decreased the conductivity, (NO 2 +NO 3 )–N and the dissolved total N in the soil solution compared with unplanted plots, but the influence was not detected systematically at each sampling depth or in each year. The differences in soil water concentrations between planting treatments remained small. In conclusion, we have shown that both planting orientation methods, horizontal and vertical, can be used for preventing nutrient leaching and maximizing biomass production. It will also be interesting to expand the application of horizontally planted willow materials in order to stabilize slops, control erosion and reclaim contaminated sites.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.biombioe.2012.09.006&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu10 citations 10 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.biombioe.2012.09.006&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Journal 2021 Finland, FinlandPublisher:Oxford University Press (OUP) Funded by:AKA | Drivers of fine root phen..., AKA | Tree responses to soil fr...AKA| Drivers of fine root phenology of boreal trees in changing climate (RootPheno) ,AKA| Tree responses to soil frost and flooding in extreme wintersDomisch, Timo; Roitto, Marja; Kilpeläinen, Jouni; Wang, Ai-Fang; Piirainen, Sirpa; Heiskanen, Juha; Makita, Naoki; Lehto, Tarja; Sutinen; Sirkka; Repo, Tapani;Abstract Winter precipitation and soil freeze–thaw events have been predicted to increase in boreal regions with climate change. This may expose tree roots to waterlogging (WL) and soil freezing (Fr) more than in the current climate and therefore affect tree growth and survival. Using a whole-tree approach, we studied the responses of silver birch (Betula pendula Roth.) saplings, growing in mineral soil, to 6-week Fr and WL in factorial combinations during dormancy, with accompanying changes in soil gas concentrations. Physiological activation (dark-acclimated chlorophyll fluorescence and chlorophyll content index) and growth of leaves and shoot elongation and stem diameter growth started earlier in Fr than NoFr (soil not frozen). The starch content of leaves was temporarily higher in Fr than NoFr in the latter part of the growing season. Short and long root production and longevity decreased, and mortality increased by soil Fr, while there were no significant effects of WL. Increased fine root damage was followed by increased compensatory root growth. At the beginning of the growing season, stem sap flow increased fastest in Fr + WL, with some delay in both NoWL (without WL) treatments. At the end of the follow-up growing season, the hydraulic conductance and impedance loss factor of roots were higher in Fr than in NoFr, but there were no differences in above- and belowground biomasses. The concentration of soil carbon dioxide increased and methane decreased by soil Fr at the end of dormancy. At the beginning of the growing season, the concentration of nitrous oxide was higher in WL than in NoWL and higher in Fr than in NoFr. In general, soil Fr had more consistent effects on soil greenhouse gas concentrations than WL. To conclude, winter-time WL alone is not as harmful for roots as WL during the growing season.
Tree Physiology arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2021 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkiadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/treephys/tpab002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 6 citations 6 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Tree Physiology arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2021 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkiadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/treephys/tpab002&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 FinlandPublisher:Elsevier BV Tarja Lehto; Tapani Repo; Olli-Pekka Tikkanen; Ana Mellado; Mai-He Li; Aino Hämäläinen; Ao Wang; Ao Wang; José A. Hódar; Jouni Kilpeläinen; Bogdan Jaroszewicz; Andreas Rigling; Andreas Rigling; Minna Luoto;Abstract The ability of plants to tolerate freezing limits their geographical distribution. Therefore, winter warming may shift a species’ occurrence northwards and/or to higher altitudes. In Europe, the hemiparasitic vascular plant Viscum album (mistletoe) has two common and widespread subspecies: V. a. ssp. album and V. a. ssp. austriacum. The former has a more northern geographic distribution than the latter. Therefore we hypothesised that seeds of V. a. ssp. album are more tolerant to freezing than those of V. a. ssp. austriacum. From these two mistletoe subspecies V. a. ssp. austriacum is, in some managed forest areas, considered a novel threat to tree growth and forest health. Berries of V. a. ssp. album were collected from Sweden, Poland and Switzerland and berries of V. a. ssp. austriacum were collected from Poland, Switzerland and Spain. After storage at −3 °C, seeds were extracted from the pulp of berries and exposed to eight different temperatures between −8 °C and −30 °C, with the storage temperature serving as the control. After freezing treatments, germination of seeds was monitored. In addition, differential thermal analysis was used to measure freeze tolerance of seeds. The seeds of V. a. ssp. album tolerated lower temperatures than seeds of V. a. ssp. austriacum. The temperature at which 50% of seeds lost their ability to germinate (LT50) was −15 °C in V. a. ssp. austriacum and between −15 °C and −19 °C in V. a. ssp. album. The results of differential thermal analysis to determine the freezing point of seeds supported these findings. The freezing tolerance of mistletoe seeds was relatively well coupled with the winter climate at the edge of their current geographic distribution. Based on our results, the warming of winters may eliminate the abiotic barrier that has thus far limited mistletoes’ expansion, opening a window of opportunity for these parasites to increase their abundance and shift their distribution range towards higher latitudes and altitudes. Although mistletoes play important ecological roles in forest ecosystems, their recent increase has raised concern among forest managers, because they may cause a substantial reduction in tree growth in single species dominated stands. Increasing tree species diversity might be an effective method for limiting future mass infestations in homogeneous managed forests.
UEF eRepository (Uni... arrow_drop_down UEF eRepository (University of Eastern Finland)Article . 2021License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)Forest Ecology and ManagementArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.foreco.2020.118806&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert UEF eRepository (Uni... arrow_drop_down UEF eRepository (University of Eastern Finland)Article . 2021License: CC BY NC NDData sources: Bielefeld Academic Search Engine (BASE)Forest Ecology and ManagementArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.foreco.2020.118806&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Other literature type , Preprint 2020 Sweden, Sweden, FinlandPublisher:Wiley Funded by:AKA | Centre of Excellence in M..., AKA | Acclimation of stomatal r...AKA| Centre of Excellence in Molecular Biology of Primary Producers ,AKA| Acclimation of stomatal responses to light: environmental cues, strategies and mechanismsAuthors: Andrew O’Hara; Luis Orlando Morales; Luis Orlando Morales; Khuanpiroon Ratanasopa; +12 AuthorsAndrew O’Hara; Luis Orlando Morales; Luis Orlando Morales; Khuanpiroon Ratanasopa; Neha Rai; Gareth I. Jenkins; Mikael Brosché; Anders V. Lindfors; Pedro J. Aphalo; Tarja Lehto; Omid Safronov; Åke Strid; Daniel Farkas; Jarkko Salojärvi; Jarkko Salojärvi; Fang Wang;AbstractThe photoreceptors UV RESISTANCE LOCUS 8 (UVR8) and CRYPTOCHROMES 1 and 2 (CRYs) play major roles in the perception of UV‐B (280–315 nm) and UV‐A/blue radiation (315–500 nm), respectively. However, it is poorly understood how they function in sunlight. The roles of UVR8 and CRYs were assessed in a factorial experiment with Arabidopsis thaliana wild‐type and photoreceptor mutants exposed to sunlight for 6 or 12 hr under five types of filters with cut‐offs in UV and blue‐light regions. Transcriptome‐wide responses triggered by UV‐B and UV‐A wavelengths shorter than 350 nm (UV‐Asw) required UVR8 whereas those induced by blue and UV‐A wavelengths longer than 350 nm (UV‐Alw) required CRYs. UVR8 modulated gene expression in response to blue light while lack of CRYs drastically enhanced gene expression in response to UV‐B and UV‐Asw. These results agree with our estimates of photons absorbed by these photoreceptors in sunlight and with in vitro monomerization of UVR8 by wavelengths up to 335 nm. Motif enrichment analysis predicted complex signaling downstream of UVR8 and CRYs. Our results highlight that it is important to use UV waveband definitions specific to plants' photomorphogenesis as is routinely done in the visible region.
bioRxiv arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2020 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkihttp://urn.kb.se/resolve?urn=u...Article . 2020 . Peer-reviewedData sources: Publikationer från Örebro universitetDigitala Vetenskapliga Arkivet - Academic Archive On-lineArticle . 2020 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/pce.13752&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 62 citations 62 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert bioRxiv arrow_drop_down HELDA - Digital Repository of the University of HelsinkiArticle . 2020 . Peer-reviewedData sources: HELDA - Digital Repository of the University of Helsinkihttp://urn.kb.se/resolve?urn=u...Article . 2020 . Peer-reviewedData sources: Publikationer från Örebro universitetDigitala Vetenskapliga Arkivet - Academic Archive On-lineArticle . 2020 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1111/pce.13752&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Journal 2019 Germany, Germany, FinlandPublisher:Oxford University Press (OUP) Funded by:EC | EPPN2020, AKA | Centre of Excellence in M..., AKA | Acclimation of stomatal r...EC| EPPN2020 ,AKA| Centre of Excellence in Molecular Biology of Primary Producers ,AKA| Acclimation of stomatal responses to light: environmental cues, strategies and mechanismsNeha Rai; Susanne Neugart; Yan Yan; Fang Wang; Sari M Siipola; Anders V Lindfors; Jana Barbro Winkler; Andreas Albert; Mikael Brosché; Tarja Lehto; Luis O Morales; Pedro J Aphalo;AbstractCryptochromes (CRYs) and UV RESISTANCE LOCUS 8 (UVR8) photoreceptors perceive UV-A/blue (315–500 nm) and UV-B (280–315 nm) radiation in plants, respectively. While the roles of CRYs and UVR8 have been studied in separate controlled-environment experiments, little is known about the interaction between these photoreceptors. Here, Arabidopsis wild-type Ler, CRYs and UVR8 photoreceptor mutants (uvr8-2, cry1cry2 and cry1cry2uvr8-2), and a flavonoid biosynthesis-defective mutant (tt4) were grown in a sun simulator. Plants were exposed to filtered radiation for 17 d or for 6 h, to study the effects of blue, UV-A, and UV-B radiation. Both CRYs and UVR8 independently enabled growth and survival of plants under solar levels of UV, while their joint absence was lethal under UV-B. CRYs mediated gene expression under blue light. UVR8 mediated gene expression under UV-B radiation, and in the absence of CRYs, also under UV-A. This negative regulation of UVR8-mediated gene expression by CRYs was also observed for UV-B. The accumulation of flavonoids was also consistent with this interaction between CRYs and UVR8. In conclusion, we provide evidence for an antagonistic interaction between CRYs and UVR8 and a role of UVR8 in UV-A perception.
Journal of Experimen... arrow_drop_down Journal of Experimental BotanyArticle . 2019 . Peer-reviewedLicense: CC BY NCData sources: CrossrefHELDA - Digital Repository of the University of HelsinkiArticle . 2019 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiPublikationenserver der Georg-August-Universität GöttingenArticle . 2020Publication Server of Helmholtz Zentrum München (PuSH)Article . 2019Data sources: Publication Server of Helmholtz Zentrum München (PuSH)Journal of Experimental BotanyArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/jxb/erz236&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 68 citations 68 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Journal of Experimen... arrow_drop_down Journal of Experimental BotanyArticle . 2019 . Peer-reviewedLicense: CC BY NCData sources: CrossrefHELDA - Digital Repository of the University of HelsinkiArticle . 2019 . Peer-reviewedData sources: HELDA - Digital Repository of the University of HelsinkiPublikationenserver der Georg-August-Universität GöttingenArticle . 2020Publication Server of Helmholtz Zentrum München (PuSH)Article . 2019Data sources: Publication Server of Helmholtz Zentrum München (PuSH)Journal of Experimental BotanyArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/jxb/erz236&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019 Canada, FinlandPublisher:Canadian Science Publishing Kilpeläinen, Jouni; Domisch, Timo; Lehto, Tarja; Finér, Leena; Aphalo, Pedro J.; Leinonen, Ilkka; Ryyppö, Aija; Repo, Tapani;handle: 1807/96845
Tree roots comprise a huge carbon pool. Their dynamics are driven by environmental factors and thereby affected by climate change. We studied the effects of soil temperature on root and shoot phenology and their linkages in Norway spruce (Picea abies (L.) Karst.). Saplings were grown in controlled-environment rooms for three simulated growing seasons (GS1, GS2, and GS3). Soil-temperature treatments of 9, 13, 18, and 21 °C were applied during GS2. Root growth was monitored with minirhizotrons and commenced in all treatments simultaneously. Temporal growth patterns of short and long roots were usually bimodal. Root growth was very low during the coldest treatment of GS2 but increased during GS3 as an aftereffect. During GS3, growth of short roots continued later after colder treatments than warmer treatments. Reduced sink strength of roots and increased carbohydrate accumulation into needles at 9 °C during GS2 probably enabled compensatory root growth under restored temperatures during GS3. Soil temperature did not affect shoot phenology, and root and shoot phenology varied between growing seasons; thus, the linkage of root and shoot phenology was inconsistent. In warmer soil, root longevity was shorter and turnover rate was higher than in colder soil. This can further affect soil carbon dynamics and ecosystem carbon cycling in boreal forest ecosystems.
Canadian Journal of ... arrow_drop_down University of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaCanadian Journal of Forest ResearchArticle . 2019 . Peer-reviewedLicense: CSP TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1139/cjfr-2019-0190&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 8 citations 8 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Canadian Journal of ... arrow_drop_down University of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaCanadian Journal of Forest ResearchArticle . 2019 . Peer-reviewedLicense: CSP TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1139/cjfr-2019-0190&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2013 France, FinlandPublisher:Springer Science and Business Media LLC Funded by:AKA | Tree responses to soil fr...AKA| Tree responses to soil frost and flooding in extreme wintersTarja Lehto; Tapani Repo; Monica Calvo-Polanco; Janusz J. Zwiazek; Marja Roitto; Ai-Fang Wang; Ai-Fang Wang;Waterlogging is predicted to become more common in boreal forests during winter and early spring with climate change. So far, little is known about the waterlogging tolerance of boreal tree species during their winter dormancy. The aim was to quantify the degree of waterlogging tolerance of 1-year-old dormant Norway spruce (Picea abies (L.) Karst.) seedlings. The seedlings were exposed to waterlogging in a growth chamber at temperature of 2 °C for 4 weeks and then allowed to recover for 6 weeks during the growth stage. Shoot and root responses were monitored by physiological and growth measurements. No effect was found in the seedling biomass, but root mortality increased slightly during the early growth stage following waterlogging. The water potential of the needles became less negative at the end of the waterlogging and the early growth stage. The ratio of apoplastic to symplastic electrical resistance (R e/R i) of the needles was lower after waterlogging, indicating changes in the proportions of symplastic and apoplastic space. No differences were found between the treatments in the dark-acclimated chlorophyll fluorescence (F v/F m) of the needles. Slightly greater accumulation of starch and temporary reductions of some mineral nutrients in needles were found after waterlogging. We conclude that in late winter and early spring, Norway spruce seedlings potentially tolerate short periods of waterlogging.
Hyper Article en Lig... arrow_drop_down INRIA a CCSD electronic archive serverArticle . 2013Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s13595-013-0325-5&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 17 citations 17 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Hyper Article en Lig... arrow_drop_down INRIA a CCSD electronic archive serverArticle . 2013Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2014 FinlandPublisher:Springer Science and Business Media LLC Funded by:AKA | Tree responses to soil fr..., AKA | Mycorrhizas in ecosystems...AKA| Tree responses to soil frost and flooding in extreme winters ,AKA| Mycorrhizas in ecosystems revisited: Climatic and nutritional determinants of success for mycorrhiza typesAuthors: Korhonen, Anna; Lehto, Tarja; Repo, Tapani;pmid: 25404213
Survival and functioning of mycorrhizal associations at low temperatures are not known well. In an earlier study, ectomycorrhizas did not affect the frost hardiness of Scots pine (Pinus sylvestris L.) roots, but here we studied whether differential nutrient availability would change the result and additionally, alter frost hardiness aboveground. The aim in this experiment was to compare the frost hardiness of roots and needles of mycorrhizal (Hebeloma sp.) and non-mycorrhizal Scots pine seedlings raised using two fertilization treatments and two cold-hardening regimes. The fertilization treatments were low (LF) and high (HF) application of a complete nutrient solution. Three hundred mycorrhizal and non-mycorrhizal seedlings were cultivated in growth chambers in four blocks for 16 weeks. For the first 9 weeks, the seedlings grew in long-day and high-temperature (LDHT) with low fertilization and then they were raised for 3 weeks in LDHT with either low or high fertilization. After this, half of the plants in each treatment combination remained in LDHT, and half were transferred to short-day and low-temperature (SDLT) conditions to cold acclimatize. The frost hardiness of the roots and needles was assessed using controlled freezing tests followed by electrolyte leakage tests (REL). Mycorrhizal roots were slightly more frost hardy than non-mycorrhizal roots, but only in the growing-season conditions (LDHT) in low-nutrient treatment. In LDHT and LF, the frost hardiness of the non-mycorrhizal roots was about -9 °C, and that of the non-mycorrhizal HF roots and the mycorrhizal roots in both fertilization levels was about -11 °C. However, no difference was found in the roots within the SDLT regime, and in needles, there was no difference between mycorrhizal and fertilization treatments. The frost hardiness of needles increased by SDLT treatment, being -8.5 and -14.1 °C in LDHT and SDLT, respectively. The dry mass of roots, stems, and needles was lower in LF than in HF and lower in SDLT than in LDHT. Mycorrhizal treatment did not affect the dry mass or its allocation. Although the mycorrhizal roots were slightly more frost hardy in the growing-season conditions, this is not likely to have significance in the field.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu7 citations 7 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s00572-014-0618-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2017 FinlandPublisher:Oxford University Press (OUP) Wang, Ai-Fang; Roitto, Marja; Lehto, Tarja; Sutinen, Sirkka; Heinonen, Jaakko; Zhang, Gang; Repo, Tapani;pmid: 28338895
Increased risk of soil waterlogging in winter and spring at northern latitudes will potentially affect forest production in the future. We studied gas exchange, chlorophyll content index, chlorophyll fluorescence, nutrient concentration and biomass accumulation in 1-year-old silver (Betula pendula Roth) and pubescent birch (Betula pubescens Ehrh.) seedlings. We hypothesized that B. pubescens has different physiological mechanisms that make it tolerate waterlogging better than B. pendula. The treatments were: (i) no waterlogging throughout the experiment; (ii) 4-week waterlogging during dormancy (dormancy waterlogging 'DW'); (iii) 4-week waterlogging during the early growing season (growth waterlogging 'GW'); and (iv) 4-week DW followed by 4-week GW during the early growing season ('DWGW'). Stomatal conductance and light-saturated net assimilation rate were reduced by GW in both species, and in B. pubescens also by DW. However, recovery was seen during the follow-up growing season. In B. pendula, DW, GW and DWGW temporarily resulted in reduced stem biomass, and GW and DWGW caused reduced leaf biomass. In B. pubescens, the stem biomass was decreased in GW and DWGW. Leaf nitrogen (N) and phosphorus (P) concentrations were generally low, and increased by GW, while potassium, calcium, magnesium and to some extent, boron and zinc concentrations decreased in both species and additionally manganese in B. pendula. The increases in N and P are mostly due to a concentration effect due to smaller leaf biomass, yet suggest that their uptake was not impaired. The decreases in cation concentrations are likely to be connected to impaired root functioning, which was not yet fully recovered from GW. We conclude that morphological acclimation to waterlogging of the leaves and roots rather than photosynthesis explains why B. pubescens is able to grow better in wetter areas than B. pendula.
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You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess Routesbronze 16 citations 16 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1093/treephys/tpx021&type=result"></script>'); --> </script>
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