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Evidence for hydraulic vulnerability segmentation and lack of xylem refilling under tension

hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorCHARRIER, Guillaume
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.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierWestern Sydney University
dc.contributor.authorCHOAT, Brendan
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierUnité Mixte de Recherche en Santé Végétale (INRA/ENITA) [UMRSV]
dc.contributor.authorDELMAS, Chloé E. L.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierNorth Carolina State University [Raleigh] [NC State]
dc.contributor.authorDOMEC, Jean-Christophe
hal.structure.identifierUniversität Ulm - Ulm University [Ulm, Allemagne]
dc.contributor.authorJANSEN, Steven
hal.structure.identifierSynchrotron SOLEIL [SSOLEIL]
dc.contributor.authorKING, Andrew
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorLENOIR, Nicolas
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.authorGAMBETTA, Gregory
ORCID: 0000-0002-8838-5050
IDREF: 225449641
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.accessioned2024-04-08T12:10:10Z
dc.date.available2024-04-08T12:10:10Z
dc.date.issued2016
dc.identifier.issn0032-0889
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196614
dc.description.abstractEnThe vascular system of grapevine has been reported as being highly vulnerable, even though grapevine regularly experiences seasonal drought. Stomata would consequently remain open below water potentials that would generate a high loss of stem hydraulic conductivity via xylem embolism. This situation would necessitate daily cycles of embolism repair to restore hydraulic function.. However, a more parsimonious explanation is that some hydraulic techniques are prone to artifacts in species with long vessels, leading to overestimation of vulnerability. The aim of this study was to provide an unbiased assessment of (i) the vulnerability to drought-induced embolism in perennial and annual organs, and (ii) the ability to refill embolized vessels in two Vitis species. X-ray micro-CT observations on intact plants indicated that both V. vinifera and V. riparia were relatively vulnerable, with the pressure inducing 50% loss of stem hydraulic conductivity (Ψ50Stem) = -1.7 and -1.3MPa, respectively. In V. vinifera, both the stem and petiole had similar sigmoidal vulnerability curves, but differed in Ψ50 (-1.7 and -1.0MPa for stem and petiole, respectively). Refilling was not observed as long as bulk xylem pressure remained negative (e.g. at the apical part of the plants): P=-0.11{plus minus}0.02MPa; ∆PLC=0.02{plus minus}0.01%). However, positive xylem pressure was observed at the basal part of the plant (P=0.04{plus minus}0.01MPa), leading to recovered conductance (∆PLC=-0.24{plus minus}0.12%). Our findings provide evidence that grapevine is unable to repair embolized xylem vessels under negative pressure, but its hydraulic vulnerability segmentation provides a significant protection of the perennial stem.
dc.language.isoen
dc.publisherOxford University Press ; American Society of Plant Biologists
dc.subjectconductivité hydraulique
dc.subjecttransport xylème
dc.subjectembolie
dc.subjectvigne
dc.subjectvitis vinifera
dc.subject.enpermeability coefficient
dc.subject.enembolism
dc.subject.engrapevine
dc.title.enEvidence for hydraulic vulnerability segmentation and lack of xylem refilling under tension
dc.typeArticle de revue
dc.identifier.doi10.1104/pp.16.01079
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.description.sponsorshipEuropeAgreenSkills+
bordeaux.journalPlant Physiology
bordeaux.page1657-1668
bordeaux.volume172
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue3
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01595398
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01595398v1
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