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Low intra-tree variability in resistance to embolism in four Pinaceae species

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierUniversität Ulm - Ulm University [Ulm, Allemagne]
dc.contributor.authorBOUCHE, Pauline S.
hal.structure.identifierUniversität Ulm - Ulm University [Ulm, Allemagne]
dc.contributor.authorJANSEN, Steven
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorSABALERA, Julia Cruz
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.issued2016
dc.identifier.issn1286-4560
dc.description.abstractEnKey messageVariability of embolism resistance within individual trees was assessed in four Pinaceae species by using a single method of measurement: the Cavitron. Contrary to what has been previously observed, our findings show a small variability in embolism resistance within and between organs. Indeed, we found (i) a lack of variability between branches within the crown, and (ii) that roots and trunks are either equally resistant or slightly more vulnerable to embolism than branches. This contradicts the vulnerability segmentation hypothesis proposed in the early 1990s. This paper also demonstrates that only few branches are necessary to determine the embolism resistance of a given tree.ContextEmbolism formation in xylem has an important impact on plant growth and survival. Since most studies on xylem embolism resistance focus on branches, it remains questionable how the entire plant deals with embolism across organs.AimsIn this study, we aimed to evaluate the variability of embolism resistance within a given organ and between different organs within a single tree.MethodsBased on the Cavitron method, we estimated the intra-organ and the intra-plant variability of embolism resistance for four Pinaceae species. In addition, we compared pit anatomical characters for wood of all organs and species.ResultsWe found no variability of embolism resistance for a given organ within a tree. At the tree level, trunks and roots were either equally or more vulnerable to embolism than branches. For all species, organs that showed a similar range of embolism resistance presented similar torus-aperture overlap values. However, the least negative P50 value for roots of Pinus pinaster was associated with the lowest torus-aperture overlap value.ConclusionOur findings suggest that P50 values are constrained within a particular organ and that intra-tree variation in embolism resistance is less substantial than previously reported. Moreover, our data do not support the vulnerability segmentation hypothesis which suggests that distal organs are more vulnerable to xylem embolism.
dc.description.sponsorshipPlateforme d'Innovation " Forêt-Bois-Fibre-Biomasse du Futur " - ANR-10-EQPX-0016
dc.language.isoen
dc.publisherSpringer Nature (since 2011)/EDP Science (until 2010)
dc.rights.urihttp://hal.archives-ouvertes.fr/licences/copyright/
dc.subject.enConifers
dc.subject.enIntra-plant variability
dc.subject.enEmbolism resistance
dc.subject.enVulnerability segmentation hypothesis
dc.subject.enTorus-margo pits
dc.title.enLow intra-tree variability in resistance to embolism in four Pinaceae species
dc.typeArticle de revue
dc.identifier.doi10.1007/s13595-016-0553-6
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalAnnals of Forest Science
bordeaux.page681-689
bordeaux.volume73
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-01532465
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01532465v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Annals%20of%20Forest%20Science&rft.date=2016&rft.volume=73&rft.issue=3&rft.spage=681-689&rft.epage=681-689&rft.eissn=1286-4560&rft.issn=1286-4560&rft.au=BOUCHE,%20Pauline%20S.&JANSEN,%20Steven&SABALERA,%20Julia%20Cruz&COCHARD,%20Herv%C3%A9&BURLETT,%20R%C3%A9gis&rft.genre=article


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