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Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes.

Identifieur interne : 001427 ( Main/Exploration ); précédent : 001426; suivant : 001428

Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes.

Auteurs : M Luke Mccormack [République populaire de Chine] ; Ian A. Dickie [Nouvelle-Zélande] ; David M. Eissenstat [États-Unis] ; Timothy J. Fahey [États-Unis] ; Christopher W. Fernandez [États-Unis] ; Dali Guo [République populaire de Chine] ; Helj Sisko Helmisaari [Finlande] ; Erik A. Hobbie [États-Unis] ; Colleen M. Iversen [États-Unis] ; Robert B. Jackson [États-Unis] ; Jaana Lepp Lammi-Kujansuu [Finlande] ; Richard J. Norby [États-Unis] ; Richard P. Phillips [États-Unis] ; Kurt S. Pregitzer [États-Unis] ; Seth G. Pritchard [États-Unis] ; Boris Rewald [Autriche] ; Marcin Zadworny [Pologne]

Source :

RBID : pubmed:25756288

Descripteurs français

English descriptors

Abstract

Fine roots acquire essential soil resources and mediate biogeochemical cycling in terrestrial ecosystems. Estimates of carbon and nutrient allocation to build and maintain these structures remain uncertain because of the challenges of consistently measuring and interpreting fine-root systems. Traditionally, fine roots have been defined as all roots ≤ 2 mm in diameter, yet it is now recognized that this approach fails to capture the diversity of form and function observed among fine-root orders. Here, we demonstrate how order-based and functional classification frameworks improve our understanding of dynamic root processes in ecosystems dominated by perennial plants. In these frameworks, fine roots are either separated into individual root orders or functionally defined into a shorter-lived absorptive pool and a longer-lived transport fine-root pool. Using these frameworks, we estimate that fine-root production and turnover represent 22% of terrestrial net primary production globally - a c. 30% reduction from previous estimates assuming a single fine-root pool. Future work developing tools to rapidly differentiate functional fine-root classes, explicit incorporation of mycorrhizal fungi into fine-root studies, and wider adoption of a two-pool approach to model fine roots provide opportunities to better understand below-ground processes in the terrestrial biosphere.

DOI: 10.1111/nph.13363
PubMed: 25756288


Affiliations:


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Le document en format XML

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<nlm:affiliation>Institute of Dendrology, Polish Academy of Sciences, Kórnik, 62-035, Poland.</nlm:affiliation>
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<series>
<title level="j">The New phytologist</title>
<idno type="eISSN">1469-8137</idno>
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<keywords scheme="KwdEn" xml:lang="en">
<term>Biomass (MeSH)</term>
<term>Ecosystem (MeSH)</term>
<term>Mycorrhizae (physiology)</term>
<term>Plant Roots (physiology)</term>
<term>Quantitative Trait, Heritable (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Biomasse (MeSH)</term>
<term>Caractère quantitatif héréditaire (MeSH)</term>
<term>Mycorhizes (physiologie)</term>
<term>Racines de plante (physiologie)</term>
<term>Écosystème (MeSH)</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr">
<term>Mycorhizes</term>
<term>Racines de plante</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en">
<term>Mycorrhizae</term>
<term>Plant Roots</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Biomass</term>
<term>Ecosystem</term>
<term>Quantitative Trait, Heritable</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Biomasse</term>
<term>Caractère quantitatif héréditaire</term>
<term>Écosystème</term>
</keywords>
</textClass>
</profileDesc>
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<front>
<div type="abstract" xml:lang="en">Fine roots acquire essential soil resources and mediate biogeochemical cycling in terrestrial ecosystems. Estimates of carbon and nutrient allocation to build and maintain these structures remain uncertain because of the challenges of consistently measuring and interpreting fine-root systems. Traditionally, fine roots have been defined as all roots ≤ 2 mm in diameter, yet it is now recognized that this approach fails to capture the diversity of form and function observed among fine-root orders. Here, we demonstrate how order-based and functional classification frameworks improve our understanding of dynamic root processes in ecosystems dominated by perennial plants. In these frameworks, fine roots are either separated into individual root orders or functionally defined into a shorter-lived absorptive pool and a longer-lived transport fine-root pool. Using these frameworks, we estimate that fine-root production and turnover represent 22% of terrestrial net primary production globally - a c. 30% reduction from previous estimates assuming a single fine-root pool. Future work developing tools to rapidly differentiate functional fine-root classes, explicit incorporation of mycorrhizal fungi into fine-root studies, and wider adoption of a two-pool approach to model fine roots provide opportunities to better understand below-ground processes in the terrestrial biosphere.</div>
</front>
</TEI>
<pubmed>
<MedlineCitation Status="MEDLINE" Owner="NLM">
<PMID Version="1">25756288</PMID>
<DateCompleted>
<Year>2016</Year>
<Month>04</Month>
<Day>26</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>207</Volume>
<Issue>3</Issue>
<PubDate>
<Year>2015</Year>
<Month>Aug</Month>
</PubDate>
</JournalIssue>
<Title>The New phytologist</Title>
<ISOAbbreviation>New Phytol</ISOAbbreviation>
</Journal>
<ArticleTitle>Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes.</ArticleTitle>
<Pagination>
<MedlinePgn>505-18</MedlinePgn>
</Pagination>
<ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.13363</ELocationID>
<Abstract>
<AbstractText>Fine roots acquire essential soil resources and mediate biogeochemical cycling in terrestrial ecosystems. Estimates of carbon and nutrient allocation to build and maintain these structures remain uncertain because of the challenges of consistently measuring and interpreting fine-root systems. Traditionally, fine roots have been defined as all roots ≤ 2 mm in diameter, yet it is now recognized that this approach fails to capture the diversity of form and function observed among fine-root orders. Here, we demonstrate how order-based and functional classification frameworks improve our understanding of dynamic root processes in ecosystems dominated by perennial plants. In these frameworks, fine roots are either separated into individual root orders or functionally defined into a shorter-lived absorptive pool and a longer-lived transport fine-root pool. Using these frameworks, we estimate that fine-root production and turnover represent 22% of terrestrial net primary production globally - a c. 30% reduction from previous estimates assuming a single fine-root pool. Future work developing tools to rapidly differentiate functional fine-root classes, explicit incorporation of mycorrhizal fungi into fine-root studies, and wider adoption of a two-pool approach to model fine roots provide opportunities to better understand below-ground processes in the terrestrial biosphere.</AbstractText>
<CopyrightInformation>© 2015 The Authors. New Phytologist © 2015 New Phytologist Trust.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y">
<Author ValidYN="Y">
<LastName>McCormack</LastName>
<ForeName>M Luke</ForeName>
<Initials>ML</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Dickie</LastName>
<ForeName>Ian A</ForeName>
<Initials>IA</Initials>
<AffiliationInfo>
<Affiliation>Bio-Protection Research Centre, Lincoln University, Canterbury, New Zealand.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Eissenstat</LastName>
<ForeName>David M</ForeName>
<Initials>DM</Initials>
<AffiliationInfo>
<Affiliation>Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, PA, 16802, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Fahey</LastName>
<ForeName>Timothy J</ForeName>
<Initials>TJ</Initials>
<AffiliationInfo>
<Affiliation>Department of Natural Resources, Cornell University, Ithaca, NY, 14853, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Fernandez</LastName>
<ForeName>Christopher W</ForeName>
<Initials>CW</Initials>
<Identifier Source="ORCID">http://orcid.org/0000-0002-6310-6027</Identifier>
<AffiliationInfo>
<Affiliation>Department of Plant Biology, University of Minnesota, St Paul, MN, 55108, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Guo</LastName>
<ForeName>Dali</ForeName>
<Initials>D</Initials>
<AffiliationInfo>
<Affiliation>Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Helmisaari</LastName>
<ForeName>Heljä-Sisko</ForeName>
<Initials>HS</Initials>
<AffiliationInfo>
<Affiliation>Department of Forest Sciences, University of Helsinki, Helsinki, Finland.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Hobbie</LastName>
<ForeName>Erik A</ForeName>
<Initials>EA</Initials>
<AffiliationInfo>
<Affiliation>Earth Systems Research Center, University of New Hampshire, Durham, NH, 03824, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Iversen</LastName>
<ForeName>Colleen M</ForeName>
<Initials>CM</Initials>
<AffiliationInfo>
<Affiliation>Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Jackson</LastName>
<ForeName>Robert B</ForeName>
<Initials>RB</Initials>
<AffiliationInfo>
<Affiliation>Department of Earth System Science, Stanford University, Stanford, CA, 94305, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Leppälammi-Kujansuu</LastName>
<ForeName>Jaana</ForeName>
<Initials>J</Initials>
<AffiliationInfo>
<Affiliation>Department of Forest Sciences, University of Helsinki, Helsinki, Finland.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Norby</LastName>
<ForeName>Richard J</ForeName>
<Initials>RJ</Initials>
<AffiliationInfo>
<Affiliation>Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Phillips</LastName>
<ForeName>Richard P</ForeName>
<Initials>RP</Initials>
<AffiliationInfo>
<Affiliation>Department of Biology, Indiana University, Bloomington, IN, 47405, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Pregitzer</LastName>
<ForeName>Kurt S</ForeName>
<Initials>KS</Initials>
<AffiliationInfo>
<Affiliation>Department of Forest, Rangeland, and Fire Sciences, University of Idaho, Moscow, ID, 83844, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Pritchard</LastName>
<ForeName>Seth G</ForeName>
<Initials>SG</Initials>
<AffiliationInfo>
<Affiliation>Department of Biology, College of Charleston, Charleston, SC, 29401, USA.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Rewald</LastName>
<ForeName>Boris</ForeName>
<Initials>B</Initials>
<AffiliationInfo>
<Affiliation>Institute of Forest Ecology, University of Natural Resources and Life Sciences, Vienna, Austria.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Zadworny</LastName>
<ForeName>Marcin</ForeName>
<Initials>M</Initials>
<AffiliationInfo>
<Affiliation>Institute of Dendrology, Polish Academy of Sciences, Kórnik, 62-035, Poland.</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>
<PublicationType UI="D016454">Review</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic">
<Year>2015</Year>
<Month>03</Month>
<Day>10</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>England</Country>
<MedlineTA>New Phytol</MedlineTA>
<NlmUniqueID>9882884</NlmUniqueID>
<ISSNLinking>0028-646X</ISSNLinking>
</MedlineJournalInfo>
<CitationSubset>IM</CitationSubset>
<CommentsCorrectionsList>
<CommentsCorrections RefType="CommentIn">
<RefSource>New Phytol. 2016 Oct;212(2):310-2</RefSource>
<PMID Version="1">27574893</PMID>
</CommentsCorrections>
<CommentsCorrections RefType="CommentIn">
<RefSource>New Phytol. 2016 Oct;212(2):313</RefSource>
<PMID Version="1">27574961</PMID>
</CommentsCorrections>
</CommentsCorrectionsList>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D018533" MajorTopicYN="N">Biomass</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017753" MajorTopicYN="Y">Ecosystem</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName>
<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName>
<QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D019655" MajorTopicYN="N">Quantitative Trait, Heritable</DescriptorName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM">
<Keyword MajorTopicYN="N">below ground</Keyword>
<Keyword MajorTopicYN="N">ecosystem</Keyword>
<Keyword MajorTopicYN="N">ecosystem modeling</Keyword>
<Keyword MajorTopicYN="N">fine-root order</Keyword>
<Keyword MajorTopicYN="N">mycorrhizal fungi</Keyword>
<Keyword MajorTopicYN="N">net primary productivity (NPP)</Keyword>
<Keyword MajorTopicYN="N">plant allocation</Keyword>
<Keyword MajorTopicYN="N">plant traits</Keyword>
</KeywordList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="received">
<Year>2014</Year>
<Month>11</Month>
<Day>27</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="accepted">
<Year>2015</Year>
<Month>02</Month>
<Day>07</Day>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2015</Year>
<Month>3</Month>
<Day>11</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="pubmed">
<Year>2015</Year>
<Month>3</Month>
<Day>11</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2016</Year>
<Month>4</Month>
<Day>27</Day>
<Hour>6</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
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<affiliations>
<list>
<country>
<li>Autriche</li>
<li>Finlande</li>
<li>Nouvelle-Zélande</li>
<li>Pologne</li>
<li>République populaire de Chine</li>
<li>États-Unis</li>
</country>
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<li>Pennsylvanie</li>
<li>Uusimaa</li>
<li>Vienne (Autriche)</li>
<li>État de New York</li>
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<li>Ithaca (New York)</li>
<li>University Park (Pennsylvanie)</li>
<li>Vienne (Autriche)</li>
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<li>Université d'Helsinki</li>
<li>Université d'État de Pennsylvanie</li>
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<name sortKey="Phillips, Richard P" sort="Phillips, Richard P" uniqKey="Phillips R" first="Richard P" last="Phillips">Richard P. Phillips</name>
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<name sortKey="Pritchard, Seth G" sort="Pritchard, Seth G" uniqKey="Pritchard S" first="Seth G" last="Pritchard">Seth G. Pritchard</name>
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