Carbon allocation and partitioning in Populus tremuloides are modulated by ectomycorrhizal fungi under phosphorus limitation.
Identifieur interne : 001019 ( Main/Exploration ); précédent : 001018; suivant : 001020Carbon allocation and partitioning in Populus tremuloides are modulated by ectomycorrhizal fungi under phosphorus limitation.
Auteurs : Shalaka Shinde [États-Unis] ; Dhiraj Naik [États-Unis] ; Jonathan R. Cumming [États-Unis]Source :
- Tree physiology [ 1758-4469 ] ; 2018.
Descripteurs français
- KwdFr :
- MESH :
- microbiologie : Populus, Racines de plante.
- métabolisme : Carbone, Phosphore, Populus, Racines de plante.
- physiologie : Laccaria, Mycorhizes, Photosynthèse.
- Biomasse, Sol.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Carbon, Phosphorus.
- metabolism : Plant Roots, Populus.
- microbiology : Plant Roots, Populus.
- physiology : Laccaria, Mycorrhizae, Photosynthesis.
- Biomass, Soil.
Abstract
The fate of carbon (C) captured by forest trees during photosynthesis is influenced by the supply of other resources. Fixed C may be partitioned among biomolecules within the leaf and/or allocated throughout the tree to growth, storage and maintenance activities. Phosphorus (P) availability often limits tree productivity due to its high biological demand and strong interactions with soil minerals. As ectomycorrhizal (ECM) fungi play critical roles in enhancing phosphate (Pi) acquisition by their hosts, these symbioses will influence the fate of C within trees and forested ecosystems. Using Populus tremuloides Michx. (trembling aspen) in symbiosis with Laccaria bicolor (Marie) P.D. Orton or Paxillus involutus (Batsch) Fr., we assessed C acquisition, allocation and partitioning under Pi limitation, specifically focusing on primary and secondary C compounds. Both ECM fungi moderated the effects of low P on photosynthesis and C partitioning among carbohydrates and secondary metabolites by sustaining Pi uptake and translocation in P. tremuloides under Pi limitation. As leaf P declined, reductions in photosynthesis were accompanied by significant shifts in C partitioning from nonstructural carbohydrates (NSCs) to phenolic glycosides and tannins. Carbon partitioning in roots exhibited more complex patterns, with distinct increases in NSCs in nonmycorrhizal (NM) plants under Pi limitation that were not evident in plants colonized by either ECM symbiont. In general, aspen colonized by L. bicolor exhibited C partitioning patterns intermediate between those of NM and P. involutus aspen. The C cost of symbiosis was pronounced for plants supporting P. involutus, where ECM plants exhibited maintenance of photosynthesis yet reduced biomass in comparison with NM and L. bicolor aspen under Pi replete conditions. Our results indicate that the ECM symbiosis affects the disposition of C in forest trees in part by altering the acquisition of other limiting resources from soils, but also through ECM species-specific influences on host physiology. This modulation of C partitioning will have broad implications for forest ecosystem C capture, storage and cycling where nutrient resources may be limited.
DOI: 10.1093/treephys/tpx117
PubMed: 29036599
Affiliations:
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Cumming</name><affiliation wicri:level="2"><nlm:affiliation>Department of Biology, 53 Camps Drive, West Virginia University, Morgantown, WV 26506,USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology, 53 Camps Drive, West Virginia University, Morgantown, WV 26506</wicri:regionArea><placeName><region type="state">Virginie-Occidentale</region></placeName></affiliation></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="2018" type="published">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biomass (MeSH)</term><term>Carbon (metabolism)</term><term>Laccaria (physiology)</term><term>Mycorrhizae (physiology)</term><term>Phosphorus (metabolism)</term><term>Photosynthesis (physiology)</term><term>Plant Roots (metabolism)</term><term>Plant Roots (microbiology)</term><term>Populus (metabolism)</term><term>Populus (microbiology)</term><term>Soil (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Biomasse (MeSH)</term><term>Carbone (métabolisme)</term><term>Laccaria (physiologie)</term><term>Mycorhizes (physiologie)</term><term>Phosphore (métabolisme)</term><term>Photosynthèse (physiologie)</term><term>Populus (microbiologie)</term><term>Populus (métabolisme)</term><term>Racines de plante (microbiologie)</term><term>Racines de plante (métabolisme)</term><term>Sol (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon</term><term>Phosphorus</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Roots</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Populus</term><term>Racines de plante</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Roots</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Carbone</term><term>Phosphore</term><term>Populus</term><term>Racines de plante</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Laccaria</term><term>Mycorhizes</term><term>Photosynthèse</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Laccaria</term><term>Mycorrhizae</term><term>Photosynthesis</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Biomass</term><term>Soil</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Biomasse</term><term>Sol</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The fate of carbon (C) captured by forest trees during photosynthesis is influenced by the supply of other resources. Fixed C may be partitioned among biomolecules within the leaf and/or allocated throughout the tree to growth, storage and maintenance activities. Phosphorus (P) availability often limits tree productivity due to its high biological demand and strong interactions with soil minerals. As ectomycorrhizal (ECM) fungi play critical roles in enhancing phosphate (Pi) acquisition by their hosts, these symbioses will influence the fate of C within trees and forested ecosystems. Using Populus tremuloides Michx. (trembling aspen) in symbiosis with Laccaria bicolor (Marie) P.D. Orton or Paxillus involutus (Batsch) Fr., we assessed C acquisition, allocation and partitioning under Pi limitation, specifically focusing on primary and secondary C compounds. Both ECM fungi moderated the effects of low P on photosynthesis and C partitioning among carbohydrates and secondary metabolites by sustaining Pi uptake and translocation in P. tremuloides under Pi limitation. As leaf P declined, reductions in photosynthesis were accompanied by significant shifts in C partitioning from nonstructural carbohydrates (NSCs) to phenolic glycosides and tannins. Carbon partitioning in roots exhibited more complex patterns, with distinct increases in NSCs in nonmycorrhizal (NM) plants under Pi limitation that were not evident in plants colonized by either ECM symbiont. In general, aspen colonized by L. bicolor exhibited C partitioning patterns intermediate between those of NM and P. involutus aspen. The C cost of symbiosis was pronounced for plants supporting P. involutus, where ECM plants exhibited maintenance of photosynthesis yet reduced biomass in comparison with NM and L. bicolor aspen under Pi replete conditions. Our results indicate that the ECM symbiosis affects the disposition of C in forest trees in part by altering the acquisition of other limiting resources from soils, but also through ECM species-specific influences on host physiology. This modulation of C partitioning will have broad implications for forest ecosystem C capture, storage and cycling where nutrient resources may be limited.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">29036599</PMID><DateCompleted><Year>2018</Year><Month>10</Month><Day>22</Day></DateCompleted><DateRevised><Year>2018</Year><Month>10</Month><Day>22</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>38</Volume><Issue>1</Issue><PubDate><Year>2018</Year><Month>01</Month><Day>01</Day></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Carbon allocation and partitioning in Populus tremuloides are modulated by ectomycorrhizal fungi under phosphorus limitation.</ArticleTitle><Pagination><MedlinePgn>52-65</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpx117</ELocationID><Abstract><AbstractText>The fate of carbon (C) captured by forest trees during photosynthesis is influenced by the supply of other resources. Fixed C may be partitioned among biomolecules within the leaf and/or allocated throughout the tree to growth, storage and maintenance activities. Phosphorus (P) availability often limits tree productivity due to its high biological demand and strong interactions with soil minerals. As ectomycorrhizal (ECM) fungi play critical roles in enhancing phosphate (Pi) acquisition by their hosts, these symbioses will influence the fate of C within trees and forested ecosystems. Using Populus tremuloides Michx. (trembling aspen) in symbiosis with Laccaria bicolor (Marie) P.D. Orton or Paxillus involutus (Batsch) Fr., we assessed C acquisition, allocation and partitioning under Pi limitation, specifically focusing on primary and secondary C compounds. Both ECM fungi moderated the effects of low P on photosynthesis and C partitioning among carbohydrates and secondary metabolites by sustaining Pi uptake and translocation in P. tremuloides under Pi limitation. As leaf P declined, reductions in photosynthesis were accompanied by significant shifts in C partitioning from nonstructural carbohydrates (NSCs) to phenolic glycosides and tannins. Carbon partitioning in roots exhibited more complex patterns, with distinct increases in NSCs in nonmycorrhizal (NM) plants under Pi limitation that were not evident in plants colonized by either ECM symbiont. In general, aspen colonized by L. bicolor exhibited C partitioning patterns intermediate between those of NM and P. involutus aspen. The C cost of symbiosis was pronounced for plants supporting P. involutus, where ECM plants exhibited maintenance of photosynthesis yet reduced biomass in comparison with NM and L. bicolor aspen under Pi replete conditions. Our results indicate that the ECM symbiosis affects the disposition of C in forest trees in part by altering the acquisition of other limiting resources from soils, but also through ECM species-specific influences on host physiology. This modulation of C partitioning will have broad implications for forest ecosystem C capture, storage and cycling where nutrient resources may be limited.</AbstractText><CopyrightInformation>© The Author 2017. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Shinde</LastName><ForeName>Shalaka</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Department of Biology, 53 Camps Drive, West Virginia University, Morgantown, WV 26506, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Naik</LastName><ForeName>Dhiraj</ForeName><Initials>D</Initials><AffiliationInfo><Affiliation>Department of Biology, 53 Camps Drive, West Virginia University, Morgantown, WV 26506, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Cumming</LastName><ForeName>Jonathan R</ForeName><Initials>JR</Initials><AffiliationInfo><Affiliation>Department of Biology, 53 Camps Drive, West Virginia University, Morgantown, WV 26506,USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical><Chemical><RegistryNumber>27YLU75U4W</RegistryNumber><NameOfSubstance UI="D010758">Phosphorus</NameOfSubstance></Chemical><Chemical><RegistryNumber>7440-44-0</RegistryNumber><NameOfSubstance UI="D002244">Carbon</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D018533" MajorTopicYN="N">Biomass</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D002244" MajorTopicYN="N">Carbon</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D055399" MajorTopicYN="N">Laccaria</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010758" MajorTopicYN="N">Phosphorus</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010788" MajorTopicYN="N">Photosynthesis</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName><QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">Laccaria bicolor</Keyword><Keyword MajorTopicYN="Y">Paxillus involutus</Keyword><Keyword MajorTopicYN="Y">aspen</Keyword><Keyword MajorTopicYN="Y">carbohydrates</Keyword><Keyword MajorTopicYN="Y">phenolic glycosides</Keyword><Keyword MajorTopicYN="Y">stress physiology</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>03</Month><Day>07</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2017</Year><Month>08</Month><Day>30</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>10</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2018</Year><Month>10</Month><Day>23</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>10</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">29036599</ArticleId><ArticleId IdType="pii">4265245</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpx117</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Virginie-Occidentale</li></region></list><tree><country name="États-Unis"><region name="Virginie-Occidentale"><name sortKey="Shinde, Shalaka" sort="Shinde, Shalaka" uniqKey="Shinde S" first="Shalaka" last="Shinde">Shalaka Shinde</name></region><name sortKey="Cumming, Jonathan R" sort="Cumming, Jonathan R" uniqKey="Cumming J" first="Jonathan R" last="Cumming">Jonathan R. Cumming</name><name sortKey="Naik, Dhiraj" sort="Naik, Dhiraj" uniqKey="Naik D" first="Dhiraj" last="Naik">Dhiraj Naik</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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