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Vulnerability to embolism in herbaceous and secondarily woody species

hal.structure.identifierNaturalis Biodiversity Center [Leiden]
dc.contributor.authorLENS, Frederic
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierUnité de recherche sur l'Ecosystème Prairial [UREP]
dc.contributor.authorPICON-COCHARD, Catherine
hal.structure.identifierInstitute for Systematic Botany and Ecology
dc.contributor.authorJANSEN, Steven
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCHAUVIN, Thibaud
hal.structure.identifierNaturalis Biodiversity Center [Leiden]
dc.contributor.authorCHACON DORIA, Larissa
hal.structure.identifierUniversidad de La Laguna [Tenerife - SP] [ULL]
dc.contributor.authorDEL ARCO, Marcelino
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.issued2015
dc.date.conference2015-09-07
dc.description.abstractEnThere is a common idea that most herbaceous species refill their embolized vessels each night via positive root pressure, meaning that there is no need to become resistant to embolism. Our study assesses the range in vulnerability to embolism in herbaceous species, and evaluates whether closely related secondarily woody species are always more embolism resistant than their herbaceous ancestors. Therefore, three non-related plant groups are investigated: 1) grass species, 2) the Gentianaceae sister pair Blackstonia (herbaceous) and Ixanthus (woody), and 3) the daisy lineage (Asteraceae) with herbaceous (Leucanthemum, Chamaemelum) and woody members (Argyranthemum). Surprisingly, the grass dataset shows an extraordinary range in P50, ranging from 0.5 – 7.5MPa. This suggests that at least in the resistant species daily refilling does not occur, although this needs to be quantified. The anatomy of the grass stems shows a tight trade-off between P50 and stem lignification. Within the daisy lineage, all the woody species are more embolism resistant than their herbaceous relatives, but the Blackstonia- Ixanthus sister group has a similar P50 value (-4.5MPa), showing that more woodiness/lignification does not always go hand in hand with more embolism resistance.
dc.language.isoen
dc.publisherINRA - Université de Bordeaux
dc.publisher.locationBordeaux (france)
dc.subject.enEmbolism
dc.title.enVulnerability to embolism in herbaceous and secondarily woody species
dc.typeCommunication dans un congrès
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.page86 p.
bordeaux.conference.titleXylem International Meeting
bordeaux.countryFR
bordeaux.conference.cityBordeaux
bordeaux.peerReviewedoui
hal.identifierhal-02740600
hal.version1
hal.invitednon
hal.conference.end2015-09-09
hal.popularnon
hal.audienceNationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02740600v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2015&rft.spage=86%20p.&rft.epage=86%20p.&rft.au=LENS,%20Frederic&COCHARD,%20Herv%C3%A9&PICON-COCHARD,%20Catherine&JANSEN,%20Steven&CHAUVIN,%20Thibaud&rft.genre=unknown


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