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Direct observation and modelling of embolism spread between xylem conduits: a case study in Scots pine

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.authorCOCHARD, Hervé
hal.structure.identifierUniversity of Edinburgh [Edin.]
hal.structure.identifierInstitució Catalana de Recerca i Estudis Avançats = Catalan Institution for Research and Advanced Studies [ICREA]
dc.contributor.authorMENCUCCINI, Maurizio
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.authorBADEL, Eric
dc.date.issued2016
dc.identifier.issn0140-7791
dc.description.abstractEnXylem embolism is one of the main processes involved in drought-related plant mortality. Although its consequences for plant physiology are already well described, embolism formation and spread are poorly evaluated and modelled, especially for tracheid-based species. The aim of this study was to assess the embolism formation and spread in Pinus sylvestris as a case study using X-ray microtomography and hydraulics methods. We also evaluated the potential effects of cavitation fatigue on vulnerability to embolism and the micro-morphology of the bordered pits using scanning electron microscopy (SEM) to test for possible links between xylem anatomy and embolism spread. Finally, a novel model was developed to simulate the spread of embolism in a 2D anisotropic cellular structure. Results showed a large variability in the formation and spread of embolism within a ring despite no differences being observed in intertracheid pit membrane anatomical traits. Simulations from the model showed a highly anisotropic tracheid-to-tracheid embolism spreading pattern, which confirms the major role of tracheid-to-tracheid air seeding to explain how embolism spreads in Scots pine. The results also showed that prior embolism removal from the samples reduced the resistance to embolism of the xylem and could result in overestimates of vulnerability to embolism.
dc.language.isoen
dc.publisherWiley
dc.subjectcavitation
dc.subjectfatigue
dc.subjectvulnérabilité
dc.subjectembolisme
dc.subjectmicrotomographie
dc.subjectanatomie du xylème
dc.subject.envulnerability to embolism
dc.subject.enxylem anatomy
dc.subject.enx-ray microtomography
dc.subject.endrought-induced embolism
dc.subject.enstress-induced
dc.subject.envulnerability segmentation
dc.subject.enhydraulic conductance
dc.subject.enresistance
dc.subject.enrecovery
dc.subject.enmechanism
dc.subject.enconifers
dc.subject.encurves
dc.subject.envulnerability
dc.title.enDirect observation and modelling of embolism spread between xylem conduits: a case study in Scots pine
dc.typeArticle de revue
dc.identifier.doi10.1111/pce.12840
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalPlant, Cell and Environment
bordeaux.page2774-2785
bordeaux.volume39
bordeaux.issue12
bordeaux.peerReviewedoui
hal.identifierhal-01512094
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01512094v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant,%20Cell%20and%20Environment&rft.date=2016&rft.volume=39&rft.issue=12&rft.spage=2774-2785&rft.epage=2774-2785&rft.eissn=0140-7791&rft.issn=0140-7791&rft.au=TORRES%20RUIZ,%20Jose%20Manuel&COCHARD,%20Herv%C3%A9&MENCUCCINI,%20Maurizio&DELZON,%20Sylvain&BADEL,%20Eric&rft.genre=article


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