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Testing the "microbubble effect" using the Cavitron technique to measure xylem water extraction curves

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierUniversity of California [Los Angeles] [UCLA]
dc.contributor.authorPIVOVAROFF, Alexandria Lynn
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorLAVIGNE, Bruno
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierDepartment of Botany and Plant Sciences
dc.contributor.authorSANTIAGO, Louis S.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.issued2016
dc.identifier.issn2041-2851
dc.description.abstractEnPlant resistance to xylem cavitation is a major drought adaptation trait and is essential to characterizing vulnerability to climate change. Cavitation resistance can be determined with vulnerability curves. In the past decade, new techniques have increased the ease and speed at which vulnerability curves are produced. However, these new techniques are also subject to new artefacts, especially as related to long-vesselled species. We tested the reliability of the ‘flow rotor’ centrifuge technique, the so-called Cavitron, and investigated one potential mechanism behind the open vessel artefact in centrifuge-based vulnerability curves: the microbubble effect. The microbubble effect hypothesizes that microbubbles introduced to open vessels, either through sample flushing or injection of solution, travel by buoyancy or mass flow towards the axis of rotation where they artefactually nucleate cavitation. To test the microbubble effect, we constructed vulnerability curves using three different rotor sizes for five species with varying maximum vessel length, as well as water extraction curves that are constructed without injection of solution into the rotor. We found that the Cavitron technique is robust to measure resistance to cavitation in tracheid-bearing and short-vesselled species, but not for long-vesselled ones. Moreover, our results support the microbubble effect hypothesis as the major cause for the open vessel artefact in long-vesselled species.
dc.language.isoen
dc.publisherOxford University Press
dc.subjectplant hydraulics
dc.subject.enembolism
dc.subject.envessel length artefact
dc.subject.enwater relations
dc.subject.encavitation resistance
dc.title.enTesting the "microbubble effect" using the Cavitron technique to measure xylem water extraction curves
dc.typeArticle de revue
dc.identifier.doi10.1093/aobpla/plw011
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
bordeaux.journalAoB Plants
bordeaux.page10 p.
bordeaux.volume8
bordeaux.peerReviewedoui
hal.identifierhal-02636495
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02636495v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=AoB%20Plants&rft.date=2016&rft.volume=8&rft.spage=10%20p.&rft.epage=10%20p.&rft.eissn=2041-2851&rft.issn=2041-2851&rft.au=PIVOVAROFF,%20Alexandria%20Lynn&BURLETT,%20R%C3%A9gis&LAVIGNE,%20Bruno&COCHARD,%20Herv%C3%A9&SANTIAGO,%20Louis%20S.&rft.genre=article


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