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An inconvenient truth about xylem resistance to embolism in the model species for refilling Laurus nobilis L.

dc.rights.licenseopenen_US
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorLAMARQUE, Laurent
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCORSO, Déborah
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorTORRES RUIZ, Jose Manuel
dc.contributor.authorBADEL, Eric
dc.contributor.authorBRODRIBB, Timothy J.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorCHARRIER, Guillaume
dc.contributor.authorCHOAT, Brendan
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorGAMBETTA, Gregory
dc.contributor.authorJANSEN, Steven
dc.contributor.authorKING, Andrew
dc.contributor.authorLENOIR, Nicolas
dc.contributor.authorMARTIN-STPAUL, Nicolas
dc.contributor.authorSTEPPE, Kathy
dc.contributor.authorVAN DEN BULCKE, Jan
dc.contributor.authorZHANG, Ya
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.accessioned2020-04-10T08:59:16Z
dc.date.available2020-04-10T08:59:16Z
dc.date.issued2018
dc.identifier.issn1286-4560en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/4212
dc.description.abstractEnKey message Direct, non-invasive X-ray microtomography and optical technique observations applied in stems and leaves of intact seedlings revealed that laurel is highly resistant to drought-induced xylem embolism. Contrary to what has been brought forward, daily cycles of embolism formation and refilling are unlikely to occur in this species and to explain how it copes with drought. Context There has been considerable controversy regarding xylem embolism resistance for long-vesselled angiosperm species and particularly for the model species for refilling (Laurus nobilis L.). Aims The purpose of this study was to resolve the hydraulic properties of this species by documenting vulnerability curves of different organs in intact plants.Methods Here, we applied a direct, non-invasive method to visualize xylem embolism in stems and leaves of intact laurel seedlings up to 2-m tall using X-ray microtomography (microCT) observations and the optical vulnerability technique. These approaches were coupled with complementary centrifugation measurements performed on 1-m long branches sampled from adult trees and compared with additional microCT analyses carried out on 80-cm cut branches.Results Direct observations of embolism spread during desiccation of intact laurels revealed that 50% loss of xylem conductivity (Ψ50) was reached at − 7.9 ± 0.5 and − 8.4 ± 0.3 MPa in stems and leaves, respectively, while the minimum xylem water potentials measured in the field were − 4.2 MPa during a moderate drought season. Those findings reveal that embolism formation is not routine in Laurus nobilis contrary to what has been previously reported. These Ψ50 values were close to those based on the flow-centrifuge technique (− 9.2 ± 0.2 MPa), but at odds with microCT observations of cut branches (− 4.0 ± 0.5 MPa). Conclusion In summary, independent methods converge toward the same conclusion that laurel is highly resistant to xylem embolism regardless its development stage. Under typical growth conditions without extreme drought events, this species maintains positive hydraulic safety margin, while daily cycles of embolism formation and refilling are unlikely to occur in this species.
dc.language.isoENen_US
dc.subjectXylème
dc.subjectEspèce modèle
dc.subjectLaurus Nobilis
dc.subjectEmbolie
dc.subjectMicrotomographie
dc.subjectDonnée optique
dc.subjectRésistance à la sécheresse
dc.subjectFonctionnement hydraulique
dc.subject.enXylem Embolism
dc.subject.enDrought Resistance
dc.subject.enLaurel
dc.subject.enRefilling
dc.subject.enHydraulics
dc.subject.enDesiccation
dc.title.enAn inconvenient truth about xylem resistance to embolism in the model species for refilling Laurus nobilis L.
dc.title.alternativeAnn. for. sci.en_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1007/s13595-018-0768-9
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
bordeaux.journalAnnals of Forest Scienceen_US
bordeaux.page75-88en_US
bordeaux.volume75en_US
bordeaux.hal.laboratoriesEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV) - UMR 1287en_US
bordeaux.issue3en_US
bordeaux.institutionBordeaux Sciences Agroen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-03170501
hal.version1
hal.date.transferred2021-03-16T10:23:29Z
hal.exporttrue
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Annals%20of%20Forest%20Science&rft.date=2018&rft.volume=75&rft.issue=3&rft.spage=75-88&rft.epage=75-88&rft.eissn=1286-4560&rft.issn=1286-4560&rft.au=LAMARQUE,%20Laurent&CORSO,%20D%C3%A9borah&TORRES%20RUIZ,%20Jose%20Manuel&BADEL,%20Eric&BRODRIBB,%20Timothy%20J.&rft.genre=article


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