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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 Plant Biologyarrow_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
Plant Biology
Article . 2007 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: Crossref
Plant Biology
Article . 2008
Data sources: Europe PubMed Central
Plant Biology
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Relationships among Three Pathways for Resource Acquisition and their Contribution to Plant Performance in the Emergent Aquatic Plant Lythrum salicaria (L.)

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Nov 2007Publisher:WileyJournal:Plant Biology, volume 9, pages 758-765 (issn: 1435-8603, eissn: 1438-8677, Copyright policy )
Authors: R. L. Peterson; K. J. Stevens;

doi: 10.1055/s-2007-965079

pmid: 17538864

Relationships among Three Pathways for Resource Acquisition and their Contribution to Plant Performance in the Emergent Aquatic Plant Lythrum salicaria (L.)

Abstract

Abstract: Three pathways for resource acquisition exist in the emergent aquatic plant, Lythrum salicaria (L.); a subterranean root system, a free‐floating adventitious root system, and arbuscular mycorrhiza (AM) fungal hyphae colonizing subterranean roots. This study examined the relationship(s) among these pathways and their contribution to plant performance. If the free‐floating adventitious root system and/or AM fungi contribute to plant growth in wetland habitats, we predicted that their absence would result in a significant reduction in plant performance. Furthermore, if a reduction in resource uptake, effected by an absence of free‐floating adventitious roots and/or AM fungi, is compensated for by increased allocation to remaining pathway(s) for resource uptake, we predicted altered patterns of resource allocation among shoots and the remaining pathway(s) for resource uptake. Contrary to our predications, plants experiencing adventitious root removal and/or grown in the absence of AM fungi generally had greater biomass and total shoot height than controls. Similarly, while levels of AM colonization and subterranean root biomass displayed a treatment effect, the observed responses did not correspond with our predictions. This was also true for shoot: subterranean root dry weight ratios. Our results indicate that there is interaction among the 3 pathways for resource acquisition in L. salicaria and an effect on plant performance. The adaptive significance of these characteristics is unclear, highlighting the potential difficulties in extrapolating from terrestrial to aquatic plant species and among aquatic plant species with potentially different life history strategies.

Related Organizations
Keywords

Mycorrhizae, Water, Lythrum, Biomass, Plant Roots, Plant Shoots

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