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Xylem function and growth rate interact to determine recovery rates after exposure to extreme water deficit

hal.structure.identifierSchool of Plant Science
dc.contributor.authorBRODRIBB, Tim J.
hal.structure.identifierSchool of Plant Science
dc.contributor.authorBOWMAN, David J. M. S.
hal.structure.identifierSchool of Plant Science
dc.contributor.authorNICHOLS, Scott
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
dc.date.issued2010
dc.identifier.issn0028-646X
dc.description.abstractEnMotivated by the urgent need to understand how water stress-induced embolism limits the survival and recovery of plants during drought, the linkage between water-stress tolerance and xylem cavitation resistance was examined in one of the world’s most drought resistant conifer genera, Callitris. Four species were subjected to drought treatments of −5, −8 and −10 MPa for a period of 3–4 wk, after which plants were rewatered. Transpiration, basal growth and leaf water potential were monitored during and after drought. Lethal water potential was correlated with the tension producing a 50% loss of stem hydraulic conductivity. The most resilient species suffered minimal embolism and recovered gas exchange within days of rewatering from −10 MPa, while the most sensitive species suffered major embolism and recovered very slowly. The rate of repair of water transport in the latter case was equal to the rate of basal area growth, indicating xylem reiteration as the primary means of hydraulic repair. The survival of, and recovery from, water stress in Callitris are accurately predicted by the physiology of the stem water-transport system. As the only apparent means of xylem repair after embolism, basal area growth is a critical part of this equation.
dc.language.isoen
dc.publisherWiley
dc.subjectHYDRAULIC
dc.subjectTRANSPIRATION
dc.subject.enCALLITRIS
dc.subject.enCAVITATION
dc.subject.enCONIFER
dc.subject.enDROUGHT
dc.subject.enEMBOLISM
dc.subject.enGROWTH
dc.subject.enRECOVERY
dc.title.enXylem function and growth rate interact to determine recovery rates after exposure to extreme water deficit
dc.typeArticle de revue
dc.identifier.doi10.1111/j.1469-8137.2010.03393.x
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Phytopathologie et phytopharmacie
bordeaux.journalNew Phytologist
bordeaux.page533-542
bordeaux.volume188
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-02663810
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02663810v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2010&rft.volume=188&rft.issue=2&rft.spage=533-542&rft.epage=533-542&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=BRODRIBB,%20Tim%20J.&BOWMAN,%20David%20J.%20M.%20S.&NICHOLS,%20Scott&DELZON,%20Sylvain&BURLETT,%20R%C3%A9gis&rft.genre=article


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