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Noninvasive measurement of vulnerability to drought-induced embolism by x-ray microtomography

hal.structure.identifierHawkesbury Institute for the Environment
dc.contributor.authorCHOAT, Brendan
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorBADEL, Eric
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierInstitute for Systematic Botany and Ecology
dc.contributor.authorJANSEN, Steven
dc.date.issued2016
dc.identifier.issn0032-0889
dc.description.abstractEnHydraulic failure induced by xylem embolism is one of the primary mechanisms of plant dieback during drought. However, many of the methods used to evaluate the vulnerability of different species to drought-induced embolism are indirect and invasive, increasing the possibility that measurement artifacts may occur. Here, we utilize x-ray computed microtomography (microCT) to directly visualize embolism formation in the xylem of living, intact plants with contrasting wood anatomy (Quercus robur, Populus tremula × Populus alba, and Pinus pinaster). These observations were compared with widely used centrifuge techniques that require destructive sampling. MicroCT imaging provided detailed spatial information regarding the dimensions and functional status of xylem conduits during dehydration. Vulnerability curves based on microCT observations of intact plants closely matched curves based on the centrifuge technique for species with short vessels (P. tremula × P. alba) or tracheids (P. pinaster). For ring porous Q. robur, the centrifuge technique significantly overestimated vulnerability to embolism, indicating that caution should be used when applying this technique to species with long vessels. These findings confirm that microCT can be used to assess the vulnerability to embolism on intact plants by direct visualization.
dc.language.isoen
dc.publisherOxford University Press ; American Society of Plant Biologists
dc.title.enNoninvasive measurement of vulnerability to drought-induced embolism by x-ray microtomography
dc.typeArticle de revue
dc.identifier.doi10.1104/pp.15.00732
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
bordeaux.journalPlant Physiology
bordeaux.page273-282
bordeaux.volume170
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-02637984
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02637984v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant%20Physiology&rft.date=2016&rft.volume=170&rft.issue=1&rft.spage=273-282&rft.epage=273-282&rft.eissn=0032-0889&rft.issn=0032-0889&rft.au=CHOAT,%20Brendan&BADEL,%20Eric&BURLETT,%20R%C3%A9gis&DELZON,%20Sylvain&COCHARD,%20Herv%C3%A9&rft.genre=article


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