Attributing functions to ectomycorrhizal fungal identities in assemblages for nitrogen acquisition under stress.
Identifieur interne : 001B05 ( Main/Corpus ); précédent : 001B04; suivant : 001B06Attributing functions to ectomycorrhizal fungal identities in assemblages for nitrogen acquisition under stress.
Auteurs : Rodica Pena ; Andrea PolleSource :
- The ISME journal [ 1751-7370 ] ; 2014.
English descriptors
- KwdEn :
- Biodiversity (MeSH), Fagus (chemistry), Fagus (metabolism), Fagus (microbiology), Fungi (classification), Fungi (metabolism), Mycorrhizae (classification), Mycorrhizae (physiology), Nitrogen (analysis), Nitrogen (metabolism), Nitrogen Isotopes (analysis), Plant Roots (microbiology), Principal Component Analysis (MeSH), Stress, Physiological (MeSH).
- MESH :
- chemical , analysis : Nitrogen, Nitrogen Isotopes.
- chemistry : Fagus.
- classification : Fungi, Mycorrhizae.
- metabolism : Fagus, Fungi, Nitrogen.
- microbiology : Fagus, Plant Roots.
- physiology : Mycorrhizae.
- Biodiversity, Principal Component Analysis, Stress, Physiological.
Abstract
Mycorrhizal fungi have a key role in nitrogen (N) cycling, particularly in boreal and temperate ecosystems. However, the significance of ectomycorrhizal fungal (EMF) diversity for this important ecosystem function is unknown. Here, EMF taxon-specific N uptake was analyzed via (15)N isotope enrichment in complex root-associated assemblages and non-mycorrhizal root tips in controlled experiments. Specific (15)N enrichment in ectomycorrhizas, which represents the N influx and export, as well as the exchange of (15)N with the N pool of the root tip, was dependent on the fungal identity. Light or water deprivation revealed interspecific response diversity for N uptake. Partial taxon-specific N fluxes for ectomycorrhizas were assessed, and the benefits of EMF assemblages for plant N nutrition were estimated. We demonstrated that ectomycorrhizal assemblages provide advantages for inorganic N uptake compared with non-mycorrhizal roots under environmental constraints but not for unstressed plants. These benefits were realized via stress activation of distinct EMF taxa, which suggests significant functional diversity within EMF assemblages. We developed and validated a model that predicts net N flux into the plant based on taxon-specific (15)N enrichment in ectomycorrhizal root tips. These results open a new avenue to characterize the functional traits of EMF taxa in complex communities.
DOI: 10.1038/ismej.2013.158
PubMed: 24030593
PubMed Central: PMC3906819
Links to Exploration step
pubmed:24030593Le document en format XML
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However, the significance of ectomycorrhizal fungal (EMF) diversity for this important ecosystem function is unknown. Here, EMF taxon-specific N uptake was analyzed via (15)N isotope enrichment in complex root-associated assemblages and non-mycorrhizal root tips in controlled experiments. Specific (15)N enrichment in ectomycorrhizas, which represents the N influx and export, as well as the exchange of (15)N with the N pool of the root tip, was dependent on the fungal identity. Light or water deprivation revealed interspecific response diversity for N uptake. Partial taxon-specific N fluxes for ectomycorrhizas were assessed, and the benefits of EMF assemblages for plant N nutrition were estimated. We demonstrated that ectomycorrhizal assemblages provide advantages for inorganic N uptake compared with non-mycorrhizal roots under environmental constraints but not for unstressed plants. These benefits were realized via stress activation of distinct EMF taxa, which suggests significant functional diversity within EMF assemblages. We developed and validated a model that predicts net N flux into the plant based on taxon-specific (15)N enrichment in ectomycorrhizal root tips. These results open a new avenue to characterize the functional traits of EMF taxa in complex communities. </div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">24030593</PMID><DateCompleted><Year>2014</Year><Month>04</Month><Day>03</Day></DateCompleted><DateRevised><Year>2019</Year><Month>03</Month><Day>18</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1751-7370</ISSN><JournalIssue CitedMedium="Internet"><Volume>8</Volume><Issue>2</Issue><PubDate><Year>2014</Year><Month>Feb</Month></PubDate></JournalIssue><Title>The ISME journal</Title><ISOAbbreviation>ISME J</ISOAbbreviation></Journal><ArticleTitle>Attributing functions to ectomycorrhizal fungal identities in assemblages for nitrogen acquisition under stress.</ArticleTitle><Pagination><MedlinePgn>321-30</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1038/ismej.2013.158</ELocationID><Abstract><AbstractText>Mycorrhizal fungi have a key role in nitrogen (N) cycling, particularly in boreal and temperate ecosystems. However, the significance of ectomycorrhizal fungal (EMF) diversity for this important ecosystem function is unknown. Here, EMF taxon-specific N uptake was analyzed via (15)N isotope enrichment in complex root-associated assemblages and non-mycorrhizal root tips in controlled experiments. Specific (15)N enrichment in ectomycorrhizas, which represents the N influx and export, as well as the exchange of (15)N with the N pool of the root tip, was dependent on the fungal identity. Light or water deprivation revealed interspecific response diversity for N uptake. Partial taxon-specific N fluxes for ectomycorrhizas were assessed, and the benefits of EMF assemblages for plant N nutrition were estimated. We demonstrated that ectomycorrhizal assemblages provide advantages for inorganic N uptake compared with non-mycorrhizal roots under environmental constraints but not for unstressed plants. These benefits were realized via stress activation of distinct EMF taxa, which suggests significant functional diversity within EMF assemblages. We developed and validated a model that predicts net N flux into the plant based on taxon-specific (15)N enrichment in ectomycorrhizal root tips. These results open a new avenue to characterize the functional traits of EMF taxa in complex communities. </AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Pena</LastName><ForeName>Rodica</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>Forest Botany and Tree Physiology, Georg-August Universität Göttingen, Büsgenweg 2, Göttingen, Germany.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Polle</LastName><ForeName>Andrea</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Forest Botany and Tree Physiology, Georg-August Universität Göttingen, Büsgenweg 2, Göttingen, Germany.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate 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