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hal.structure.identifierEcologie et Ecophysiologie Forestières [devient SILVA en 2018] [EEF]
dc.contributor.authorPONTON, Stéphane
hal.structure.identifierEcologie et Ecophysiologie Forestières [devient SILVA en 2018] [EEF]
dc.contributor.authorDUPOUEY, Jean-Luc
hal.structure.identifierEcologie et Ecophysiologie Forestières [devient SILVA en 2018] [EEF]
dc.contributor.authorBRÉDA, Nathalie
hal.structure.identifierEcole Nationale du Génie Rural, des Eaux et des Forêts [ENGREF]
dc.contributor.authorFEUILLAT, F
hal.structure.identifierBiodiversité, Gènes et Ecosystèmes [BioGeCo]
dc.contributor.authorBODENES-BREZARD, Catherine
dc.date.issued2001
dc.identifier.issn0140-7791
dc.description.abstractEnThe two most common oak species in western Europe, Quercus robur and Quercus petraea, display different ecological behaviours, particularly with respect to their responses to drought. The ecophysiological basis of this niche difference is not understood well. Here we test the hypothesis that these two species present distinct water use efficiencies (WUEs), using the carbon isotope discrimination approach. Leaves and 13 dated ring sequences were sampled in 10 pairs of adult trees growing side by side. Carbon isotope composition was measured on cellulose extracts. In addition, relationships between carbon isotope discrimination and wood anatomy were assessed at the tree level. Quercus robur displayed a 1·0‰ larger isotopic discrimination than Q. petraea, and therefore a lower intrinsic WUE (- 13%). This interspecific difference of isotopic discrimination was quite stable with time and independent of tree radial growth and climate fluctuations. A strong positive correlation was observed between average tree values of earlywood vessel surface area and 13 C isotopic discrimination. This correlation was even higher with 13 C of the 1976 dry year (r = 0·86). These observations led to the hypothesis that hydraulic properties of xylem could exert a constraint on leaf gas exchange, resulting in a larger WUE for individuals with smaller vessel cross-section area.
dc.language.isoen
dc.publisherWiley
dc.subjectEFFICACITE DE L'UTILISATION DE L'EAU
dc.subject.enINTERSPECIFIC VARIABILITY
dc.subject.enOAK
dc.subject.enTREE RING
dc.subject.enVESSEL AREA
dc.subject.enWATER USE EFFICIENCY
dc.subject.enCHENE
dc.subject.enCARBONE ISOTOPE
dc.title.enCarbon isotope discrimination and wood anatomy variations in mixed stands of Quercus robur and Quercus petraea
dc.typeArticle de revue
dc.subject.halSciences du Vivant [q-bio]/Ecologie, Environnement
bordeaux.journalPlant, Cell and Environment
bordeaux.page861-868
bordeaux.volume24
bordeaux.issue8
bordeaux.peerReviewedoui
hal.identifierhal-02673999
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02673999v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant,%20Cell%20and%20Environment&rft.date=2001&rft.volume=24&rft.issue=8&rft.spage=861-868&rft.epage=861-868&rft.eissn=0140-7791&rft.issn=0140-7791&rft.au=PONTON,%20St%C3%A9phane&DUPOUEY,%20Jean-Luc&BR%C3%89DA,%20Nathalie&FEUILLAT,%20F&BODENES-BREZARD,%20Catherine&rft.genre=article


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