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Plant hydraulic: new insights brought by HRCT

hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorMARTIN-STPAUL, Nicolas
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorCHARRIER, Guillaume
hal.structure.identifierHawkesbury Institute for the Environment
dc.contributor.authorCHOAT, B.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorTORRES RUIZ, Jose Manuel
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorBADEL, Eric
hal.structure.identifierInstitute for Systematic Botany and Ecology
dc.contributor.authorJANSEN, Steven
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierPlateforme Aquitaine de Caractérisation des Matériaux [PLACAMAT]
dc.contributor.authorLENOIR, N.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.issued2015
dc.date.conference2015-09-07
dc.description.abstractEnRecent advances in plant hydraulics have shed light on artifacts generated by hydraulic measurements, in interaction with wood anatomy (e.g. long-vesseled species). Such artifacts may have important implications in the assessment of plant drought vulnerabilities, and our understanding of the whole plant water balance. In this poster, we present how high resolution computed tomography (HRCT) -- a noninvasive method, which allows the detection of air and sap-filled xylem conducing elements in the wood of intact plants -- can provide non biased assessment of plants adaptation to drought: (i) we compared Vulnerability Curves to embolism (VC) assessed with classical hydraulic methods (Bench dehydration, Static centrifuge, Cavitron) and HRCT for species with different wood anatomies (i.e. ring-porous, diffuse porous, and tracheids). (ii) we compared safety margins for stomatal conductance and minimum water potential, based on HRCT VC (3 years-old intact seedlings), with previous safety margins for the well documented Mediterranean oak Q.ilex, (iii) we computed HRCT-based VC in two grapevine species (V. vinifera cv Cabernet- Sauvignon and V. riparia cv ‘Gloire de Montpellier’), and two organs (stems and petioles). Our results (i) confirmed the existence of strong bias in VC measurements obtained by classical methods in ring-porous species, (ii) demonstrated that the safety margin in Q.ilex is 2 to 4 MPa higher than previously described in the literature and (iii) highlighted the interspecific differences in stem drought vulnerability of grapevines, and assessed how this vulnerability could be distributed from the stem to the leaf. Altogether, these data demonstrate that HRCT is a useful tool to create a sound theory of plant hydraulic responses to drought.
dc.language.isoen
dc.publisherINRA - Université de Bordeaux
dc.subjectplant hydraulic
dc.subject.enHRCT
dc.title.enPlant hydraulic: new insights brought by HRCT
dc.typeAutre communication scientifique (congrès sans actes - poster - séminaire...)
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.page86 p.
bordeaux.conference.titleXylem International Meeting
bordeaux.countryFR
bordeaux.conference.cityBordeaux
bordeaux.peerReviewedoui
hal.identifierhal-02742453
hal.version1
hal.invitednon
hal.conference.end2015-09-09
hal.popularnon
hal.audienceNationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02742453v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2015&rft.spage=86%20p.&rft.epage=86%20p.&rft.au=MARTIN-STPAUL,%20Nicolas&CHARRIER,%20Guillaume&CHOAT,%20B.&TORRES%20RUIZ,%20Jose%20Manuel&BADEL,%20Eric&rft.genre=conference


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