Saprotrophic and ectomycorrhizal fungal sporocarp stoichiometry (C : N : P) across temperate rainforests as evidence of shared nutrient constraints among symbionts.
Identifieur interne : 000370 ( Main/Exploration ); précédent : 000369; suivant : 000371Saprotrophic and ectomycorrhizal fungal sporocarp stoichiometry (C : N : P) across temperate rainforests as evidence of shared nutrient constraints among symbionts.
Auteurs : J Marty Kranabetter [Canada] ; Rachael Harman-Denhoed [Canada] ; Barbara J. Hawkins [Canada]Source :
- The New phytologist [ 1469-8137 ] ; 2019.
Descripteurs français
- KwdFr :
- Azote (analyse), Carbone (analyse), Colombie-Britannique (MeSH), Corps fructifères de champignon (composition chimique), Feuilles de plante (composition chimique), Forêt pluviale (MeSH), Microbiologie du sol (MeSH), Mycorhizes (physiologie), Phosphore (analyse), Pseudotsuga (MeSH), Sol (composition chimique), Symbiose (MeSH), Écosystème (MeSH).
- MESH :
- analyse : Azote, Carbone, Phosphore.
- composition chimique : Corps fructifères de champignon, Feuilles de plante, Sol.
- physiologie : Mycorhizes.
- Colombie-Britannique, Forêt pluviale, Microbiologie du sol, Pseudotsuga, Symbiose, Écosystème.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Carbon, Nitrogen, Phosphorus.
- chemical , chemistry : Soil.
- geographic : British Columbia.
- chemistry : Fruiting Bodies, Fungal, Plant Leaves.
- physiology : Mycorrhizae.
- Ecosystem, Pseudotsuga, Rainforest, Soil Microbiology, Symbiosis.
Abstract
Quantifying nutritional dynamics of free-living saprotrophs and symbiotic ectomycorrhizal fungi in the field is challenging, but the stoichiometry of fruiting bodies (sporocarps) may be an effective methodology for this purpose. Carbon (C), nitrogen (N) and phosphorus (P) concentrations of soils, foliage and 146 sporocarp collections were analyzed from 14 Pseudotsuga menziesii var. menziesii stands across a podzolization gradient on Vancouver Island (Canada). N and P concentrations were considerably higher in saprotrophic fungi. Fungal N% increased with soil N content at a greater rate for saprotrophs than ectomycorrhizal fungi, while fungal P% of saprotrophs was more constrained. Fungal N : P was more responsive to soil N : P for ectomycorrhizal fungi (homeostatic regulation coefficient 'H' = 2.9) than saprotrophs (H = 5.9), while N : P of ectomycorrhizal fungi and host tree foliage scaled almost identically. Results underscore the role of ectomycorrhizal fungi as nutrient conduits, supporting host trees, whereas saprotrophs maintain a greater degree of nutritional homeostasis. Site nutrient constraints were shared in equal measure between ectomycorrhizal fungi and host trees, particularly for P, suggesting neither partner benefits from enhanced nutrition at the expense of the other. Sporocarp stoichiometry provides new insights into mycorrhizal relationships and illustrates pervasive P deficiencies across temperate rainforests of the Pacific Northwest.
DOI: 10.1111/nph.15380
PubMed: 30084239
Affiliations:
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Carbon (C), nitrogen (N) and phosphorus (P) concentrations of soils, foliage and 146 sporocarp collections were analyzed from 14 Pseudotsuga menziesii var. menziesii stands across a podzolization gradient on Vancouver Island (Canada). N and P concentrations were considerably higher in saprotrophic fungi. Fungal N% increased with soil N content at a greater rate for saprotrophs than ectomycorrhizal fungi, while fungal P% of saprotrophs was more constrained. Fungal N : P was more responsive to soil N : P for ectomycorrhizal fungi (homeostatic regulation coefficient 'H' = 2.9) than saprotrophs (H = 5.9), while N : P of ectomycorrhizal fungi and host tree foliage scaled almost identically. Results underscore the role of ectomycorrhizal fungi as nutrient conduits, supporting host trees, whereas saprotrophs maintain a greater degree of nutritional homeostasis. Site nutrient constraints were shared in equal measure between ectomycorrhizal fungi and host trees, particularly for P, suggesting neither partner benefits from enhanced nutrition at the expense of the other. Sporocarp stoichiometry provides new insights into mycorrhizal relationships and illustrates pervasive P deficiencies across temperate rainforests of the Pacific Northwest.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">30084239</PMID><DateCompleted><Year>2020</Year><Month>01</Month><Day>21</Day></DateCompleted><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1469-8137</ISSN><JournalIssue CitedMedium="Internet"><Volume>221</Volume><Issue>1</Issue><PubDate><Year>2019</Year><Month>01</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Saprotrophic and ectomycorrhizal fungal sporocarp stoichiometry (C : N : P) across temperate rainforests as evidence of shared nutrient constraints among symbionts.</ArticleTitle><Pagination><MedlinePgn>482-492</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.15380</ELocationID><Abstract><AbstractText>Quantifying nutritional dynamics of free-living saprotrophs and symbiotic ectomycorrhizal fungi in the field is challenging, but the stoichiometry of fruiting bodies (sporocarps) may be an effective methodology for this purpose. Carbon (C), nitrogen (N) and phosphorus (P) concentrations of soils, foliage and 146 sporocarp collections were analyzed from 14 Pseudotsuga menziesii var. menziesii stands across a podzolization gradient on Vancouver Island (Canada). N and P concentrations were considerably higher in saprotrophic fungi. Fungal N% increased with soil N content at a greater rate for saprotrophs than ectomycorrhizal fungi, while fungal P% of saprotrophs was more constrained. Fungal N : P was more responsive to soil N : P for ectomycorrhizal fungi (homeostatic regulation coefficient 'H' = 2.9) than saprotrophs (H = 5.9), while N : P of ectomycorrhizal fungi and host tree foliage scaled almost identically. Results underscore the role of ectomycorrhizal fungi as nutrient conduits, supporting host trees, whereas saprotrophs maintain a greater degree of nutritional homeostasis. Site nutrient constraints were shared in equal measure between ectomycorrhizal fungi and host trees, particularly for P, suggesting neither partner benefits from enhanced nutrition at the expense of the other. Sporocarp stoichiometry provides new insights into mycorrhizal relationships and illustrates pervasive P deficiencies across temperate rainforests of the Pacific Northwest.</AbstractText><CopyrightInformation>© 2018 Province of British Columbia New Phytologist © 2018 New Phytologist Trust.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Kranabetter</LastName><ForeName>J Marty</ForeName><Initials>JM</Initials><Identifier Source="ORCID">0000-0001-9255-1210</Identifier><AffiliationInfo><Affiliation>British Columbia Ministry of Forests, Lands and Natural Resource Operations, PO Box 9536, Stn Prov Govt, Victoria, BC, V8W 9C4, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Harman-Denhoed</LastName><ForeName>Rachael</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>Centre for Forest Biology, University of Victoria, PO Box 3020, STN CSC, Victoria, BC, V8W 3N5, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hawkins</LastName><ForeName>Barbara J</ForeName><Initials>BJ</Initials><AffiliationInfo><Affiliation>Centre for Forest Biology, University of Victoria, PO Box 3020, STN CSC, Victoria, BC, V8W 3N5, Canada.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><DataBankList CompleteYN="Y"><DataBank><DataBankName>GENBANK</DataBankName><AccessionNumberList><AccessionNumber>WC1000</AccessionNumber><AccessionNumber>UDB034777</AccessionNumber><AccessionNumber>UDB034848</AccessionNumber></AccessionNumberList></DataBank></DataBankList><GrantList CompleteYN="Y"><Grant><Agency>British Columbia Ministry of Forests, Lands and Natural Resource Operations</Agency><Country>International</Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. 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MajorTopicYN="N">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D028224" MajorTopicYN="N">Pseudotsuga</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D065947" MajorTopicYN="Y">Rainforest</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012988" MajorTopicYN="Y">Soil Microbiology</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013559" MajorTopicYN="N">Symbiosis</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">ecosystem retrogression</Keyword><Keyword MajorTopicYN="Y">holobiont</Keyword><Keyword MajorTopicYN="Y">mutualism</Keyword><Keyword MajorTopicYN="Y">mycorrhiza</Keyword><Keyword MajorTopicYN="Y">phosphorus (P) deficiency</Keyword><Keyword MajorTopicYN="Y">podzolization</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2018</Year><Month>05</Month><Day>30</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2018</Year><Month>07</Month><Day>07</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2018</Year><Month>8</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>1</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2018</Year><Month>8</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">30084239</ArticleId><ArticleId 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