Daytime depression in temperature-normalised stem CO2 efflux in young poplar trees is dominated by low turgor pressure rather than by internal transport of respired CO2.
Identifieur interne : 000F72 ( Main/Exploration ); précédent : 000F71; suivant : 000F73Daytime depression in temperature-normalised stem CO2 efflux in young poplar trees is dominated by low turgor pressure rather than by internal transport of respired CO2.
Auteurs : Roberto L. Salom N [Belgique, Espagne] ; Veerle De Schepper [Belgique] ; María Valbuena-Caraba A [Espagne] ; Luis Gil [Espagne] ; Kathy Steppe [Belgique]Source :
- The New phytologist [ 1469-8137 ] ; 2018.
Descripteurs français
- KwdFr :
- MESH :
- métabolisme : Dioxyde de carbone, Tiges de plante, Xylème.
- physiologie : Arbres, Populus.
- Eau, Facteurs temps, Modèles linéaires, Pression, Respiration cellulaire, Température, Transport biologique.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Carbon Dioxide.
- metabolism : Plant Stems, Xylem.
- physiology : Populus, Trees.
- Biological Transport, Cell Respiration, Linear Models, Pressure, Temperature, Time Factors, Water.
Abstract
Daytime decreases in temperature-normalised stem CO2 efflux (EA_D ) are commonly ascribed to internal transport of respired CO2 (FT ) or to an attenuated respiratory activity due to lowered turgor pressure. The two are difficult to separate as they are simultaneously driven by sap flow dynamics. To achieve combined gradients in turgor pressure and FT , sap flow rates in poplar trees were manipulated through severe defoliation, severe drought, moderate defoliation and moderate drought. Turgor pressure was mechanistically modelled using measurements of sap flow, stem diameter variation, and soil and stem water potential. A mass balance approach considering internal and external CO2 fluxes was applied to estimate FT . Under well-watered control conditions, both turgor pressure and sap flow, as a proxy of FT , were reliable predictors of EA_D . After tree manipulation, only turgor pressure was a robust predictor of EA_D . Moreover, FT accounted for < 15% of EA_D . Our results suggest that daytime reductions in turgor pressure and associated constrained growth are the main cause of EA_D in young poplar trees. Turgor pressure is determined by both carbohydrate supply and water availability, and should be considered to improve our widely used but inaccurate temperature-based predictions of woody tissue respiration in global models.
DOI: 10.1111/nph.14831
PubMed: 28984360
Affiliations:
- Belgique, Espagne
- Communauté de Madrid, Province de Flandre-Orientale, Région flamande
- Gand, Madrid
- Université de Gand
Links toward previous steps (curation, corpus...)
Le document en format XML
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Salom N</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent</wicri:regionArea><orgName type="university">Université de Gand</orgName><placeName><settlement type="city">Gand</settlement><region>Région flamande</region><region type="district" nuts="2">Province de Flandre-Orientale</region></placeName></affiliation><affiliation wicri:level="3"><nlm:affiliation>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="De Schepper, Veerle" sort="De Schepper, Veerle" uniqKey="De Schepper V" first="Veerle" last="De Schepper">Veerle De Schepper</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent</wicri:regionArea><orgName type="university">Université de Gand</orgName><placeName><settlement type="city">Gand</settlement><region>Région flamande</region><region type="district" nuts="2">Province de Flandre-Orientale</region></placeName></affiliation></author><author><name sortKey="Valbuena Caraba A, Maria" sort="Valbuena Caraba A, Maria" uniqKey="Valbuena Caraba A M" first="María" last="Valbuena-Caraba A">María Valbuena-Caraba A</name><affiliation wicri:level="3"><nlm:affiliation>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Gil, Luis" sort="Gil, Luis" uniqKey="Gil L" first="Luis" last="Gil">Luis Gil</name><affiliation wicri:level="3"><nlm:affiliation>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid</wicri:regionArea><placeName><settlement type="city">Madrid</settlement><region nuts="2" type="region">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent</wicri:regionArea><orgName type="university">Université de Gand</orgName><placeName><settlement type="city">Gand</settlement><region>Région flamande</region><region type="district" nuts="2">Province de Flandre-Orientale</region></placeName></affiliation></author></analytic><series><title level="j">The New phytologist</title><idno type="eISSN">1469-8137</idno><imprint><date when="2018" type="published">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological Transport (MeSH)</term><term>Carbon Dioxide (metabolism)</term><term>Cell Respiration (MeSH)</term><term>Linear Models (MeSH)</term><term>Plant Stems (metabolism)</term><term>Populus (physiology)</term><term>Pressure (MeSH)</term><term>Temperature (MeSH)</term><term>Time Factors (MeSH)</term><term>Trees (physiology)</term><term>Water (MeSH)</term><term>Xylem (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (physiologie)</term><term>Dioxyde de carbone (métabolisme)</term><term>Eau (MeSH)</term><term>Facteurs temps (MeSH)</term><term>Modèles linéaires (MeSH)</term><term>Populus (physiologie)</term><term>Pression (MeSH)</term><term>Respiration cellulaire (MeSH)</term><term>Température (MeSH)</term><term>Tiges de plante (métabolisme)</term><term>Transport biologique (MeSH)</term><term>Xylème (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon Dioxide</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Stems</term><term>Xylem</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Dioxyde de carbone</term><term>Tiges de plante</term><term>Xylème</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Arbres</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Populus</term><term>Trees</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Biological Transport</term><term>Cell Respiration</term><term>Linear Models</term><term>Pressure</term><term>Temperature</term><term>Time Factors</term><term>Water</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Eau</term><term>Facteurs temps</term><term>Modèles linéaires</term><term>Pression</term><term>Respiration cellulaire</term><term>Température</term><term>Transport biologique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Daytime decreases in temperature-normalised stem CO<sub>2</sub> efflux (E<sub>A</sub><sub>_D</sub> ) are commonly ascribed to internal transport of respired CO<sub>2</sub> (F<sub>T</sub> ) or to an attenuated respiratory activity due to lowered turgor pressure. The two are difficult to separate as they are simultaneously driven by sap flow dynamics. To achieve combined gradients in turgor pressure and F<sub>T</sub> , sap flow rates in poplar trees were manipulated through severe defoliation, severe drought, moderate defoliation and moderate drought. Turgor pressure was mechanistically modelled using measurements of sap flow, stem diameter variation, and soil and stem water potential. A mass balance approach considering internal and external CO<sub>2</sub> fluxes was applied to estimate F<sub>T</sub> . Under well-watered control conditions, both turgor pressure and sap flow, as a proxy of F<sub>T</sub> , were reliable predictors of E<sub>A</sub><sub>_D</sub> . After tree manipulation, only turgor pressure was a robust predictor of E<sub>A</sub><sub>_D</sub> . Moreover, F<sub>T</sub> accounted for < 15% of E<sub>A</sub><sub>_D</sub> . Our results suggest that daytime reductions in turgor pressure and associated constrained growth are the main cause of E<sub>A</sub><sub>_D</sub> in young poplar trees. Turgor pressure is determined by both carbohydrate supply and water availability, and should be considered to improve our widely used but inaccurate temperature-based predictions of woody tissue respiration in global models.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">28984360</PMID><DateCompleted><Year>2019</Year><Month>09</Month><Day>12</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>217</Volume><Issue>2</Issue><PubDate><Year>2018</Year><Month>01</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Daytime depression in temperature-normalised stem CO<sub>2</sub> efflux in young poplar trees is dominated by low turgor pressure rather than by internal transport of respired CO<sub>2</sub>.</ArticleTitle><Pagination><MedlinePgn>586-598</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.14831</ELocationID><Abstract><AbstractText>Daytime decreases in temperature-normalised stem CO<sub>2</sub> efflux (E<sub>A</sub><sub>_D</sub> ) are commonly ascribed to internal transport of respired CO<sub>2</sub> (F<sub>T</sub> ) or to an attenuated respiratory activity due to lowered turgor pressure. The two are difficult to separate as they are simultaneously driven by sap flow dynamics. To achieve combined gradients in turgor pressure and F<sub>T</sub> , sap flow rates in poplar trees were manipulated through severe defoliation, severe drought, moderate defoliation and moderate drought. Turgor pressure was mechanistically modelled using measurements of sap flow, stem diameter variation, and soil and stem water potential. A mass balance approach considering internal and external CO<sub>2</sub> fluxes was applied to estimate F<sub>T</sub> . Under well-watered control conditions, both turgor pressure and sap flow, as a proxy of F<sub>T</sub> , were reliable predictors of E<sub>A</sub><sub>_D</sub> . After tree manipulation, only turgor pressure was a robust predictor of E<sub>A</sub><sub>_D</sub> . Moreover, F<sub>T</sub> accounted for < 15% of E<sub>A</sub><sub>_D</sub> . Our results suggest that daytime reductions in turgor pressure and associated constrained growth are the main cause of E<sub>A</sub><sub>_D</sub> in young poplar trees. Turgor pressure is determined by both carbohydrate supply and water availability, and should be considered to improve our widely used but inaccurate temperature-based predictions of woody tissue respiration in global models.</AbstractText><CopyrightInformation>© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Salomón</LastName><ForeName>Roberto L</ForeName><Initials>RL</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>De Schepper</LastName><ForeName>Veerle</ForeName><Initials>V</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Valbuena-Carabaña</LastName><ForeName>María</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Gil</LastName><ForeName>Luis</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>Forest Genetics and Ecophysiology Research Group, E.T.S. Forestry Engineering, Technical University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Steppe</LastName><ForeName>Kathy</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000, Ghent, Belgium.</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 DateType="Electronic"><Year>2017</Year><Month>10</Month><Day>06</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>New Phytol</MedlineTA><NlmUniqueID>9882884</NlmUniqueID><ISSNLinking>0028-646X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical><Chemical><RegistryNumber>142M471B3J</RegistryNumber><NameOfSubstance UI="D002245">Carbon Dioxide</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001692" MajorTopicYN="N">Biological Transport</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D002245" MajorTopicYN="N">Carbon Dioxide</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D019069" MajorTopicYN="N">Cell Respiration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D016014" MajorTopicYN="N">Linear Models</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D011312" MajorTopicYN="Y">Pressure</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013696" MajorTopicYN="Y">Temperature</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013997" MajorTopicYN="N">Time Factors</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">Populus × Canadensis Moench ‘Vesten’</Keyword><Keyword MajorTopicYN="Y">carbon fluxes</Keyword><Keyword MajorTopicYN="Y">growth respiration</Keyword><Keyword MajorTopicYN="Y">maintenance respiration</Keyword><Keyword MajorTopicYN="Y">mechanistic modelling</Keyword><Keyword MajorTopicYN="Y">radial stem growth</Keyword><Keyword MajorTopicYN="Y">transpiration</Keyword><Keyword MajorTopicYN="Y">xylem CO2 transport</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>06</Month><Day>14</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2017</Year><Month>09</Month><Day>01</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>10</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2019</Year><Month>9</Month><Day>13</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>10</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28984360</ArticleId><ArticleId IdType="doi">10.1111/nph.14831</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Belgique</li><li>Espagne</li></country><region><li>Communauté de Madrid</li><li>Province de Flandre-Orientale</li><li>Région flamande</li></region><settlement><li>Gand</li><li>Madrid</li></settlement><orgName><li>Université de Gand</li></orgName></list><tree><country name="Belgique"><region name="Région flamande"><name sortKey="Salom N, Roberto L" sort="Salom N, Roberto L" uniqKey="Salom N R" first="Roberto L" last="Salom N">Roberto L. Salom N</name></region><name sortKey="De Schepper, Veerle" sort="De Schepper, Veerle" uniqKey="De Schepper V" first="Veerle" last="De Schepper">Veerle De Schepper</name><name sortKey="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name></country><country name="Espagne"><region name="Communauté de Madrid"><name sortKey="Salom N, Roberto L" sort="Salom N, Roberto L" uniqKey="Salom N R" first="Roberto L" last="Salom N">Roberto L. Salom N</name></region><name sortKey="Gil, Luis" sort="Gil, Luis" uniqKey="Gil L" first="Luis" last="Gil">Luis Gil</name><name sortKey="Valbuena Caraba A, Maria" sort="Valbuena Caraba A, Maria" uniqKey="Valbuena Caraba A M" first="María" last="Valbuena-Caraba A">María Valbuena-Caraba A</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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