Afficher la notice abrégée

Insular woody daisies (Argyranthemum, Asteraceae) are more resistant to drought‐induced hydraulic failure than their herbaceous relatives

hal.structure.identifierNaturalis Biodiversity Center [Leiden]
dc.contributor.authorDÓRIA, Larissa C.
hal.structure.identifierUniversidade Estadual de Campinas = University of Campinas [UNICAMP]
dc.contributor.authorPODADERA, Diego S.
hal.structure.identifierUniversidad de La Laguna [Tenerife - SP] [ULL]
dc.contributor.authorDEL ARCO, Marcelino
hal.structure.identifierBiologie intégrée pour la valorisation de la diversité des arbres et de la forêt [BioForA]
dc.contributor.authorCHAUVIN, Thibaud
hal.structure.identifierNaturalis Biodiversity Center [Leiden]
dc.contributor.authorSMETS, Erik
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierNaturalis Biodiversity Center [Leiden]
dc.contributor.authorLENS, Frederic
dc.date.issued2018
dc.identifier.issn0269-8463
dc.description.abstractEn1- Insular woodiness refers to the evolutionary transition from herbaceousness towards derived woodiness on (sub)tropical islands and leads to island floras that have a higher proportion of woody species compared to floras of nearby continents. 2- Several hypotheses have tried to explain insular woodiness since Darwin's original observations, but experimental evidence why plants became woody on islands is scarce at best. 3- Here, we combine experimental measurements of hydraulic failure in stems (as a proxy for drought stress resistance) with stem anatomical observations in the daisy lineage (Asteraceae), including insular woody Argyranthemum species from the Canary Islands and their herbaceous continental relatives. 4- Our results show that stems of insular woody daisies are more resistant to drought‐induced hydraulic failure than the stems of their herbaceous counterparts. The anatomical character that best predicts variation in embolism resistance is intervessel pit membrane thickness (TPM), which can be functionally linked with air bubble dynamics throughout the 3D vessel network. There is also a strong link between TPM vs. degree of woodiness and thickness of the xylem fibre wall vs. embolism resistance, resulting in an indirect link between lignification and resistance to embolism formation. 5- Thicker intervessel pit membranes in Argyranthemum functionally explain why this insular woody genus is more embolism resistant to drought‐induced failure compared to the herbaceous relatives from which it has evolved, but additional data are needed to confirm that palaeoclimatic drought conditions have triggered wood formation in this daisy lineage.
dc.language.isoen
dc.publisherWiley
dc.subjecthydraulic failure
dc.subjectxylem hydraulics
dc.subject.encanary Islands
dc.subject.endrought
dc.subject.eninsular woodiness
dc.subject.enlignification
dc.subject.enstem anatomy
dc.subject.enthickness of intervessel pit membrane
dc.title.enInsular woody daisies (Argyranthemum, Asteraceae) are more resistant to drought‐induced hydraulic failure than their herbaceous relatives
dc.typeArticle de revue
dc.identifier.doi10.1111/1365-2435.13085
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalFunctional Ecology
bordeaux.page1467-1478
bordeaux.volume32
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-02628805
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02628805v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Functional%20Ecology&rft.date=2018&rft.volume=32&rft.issue=6&rft.spage=1467-1478&rft.epage=1467-1478&rft.eissn=0269-8463&rft.issn=0269-8463&rft.au=D%C3%93RIA,%20Larissa%20C.&PODADERA,%20Diego%20S.&DEL%20ARCO,%20Marcelino&CHAUVIN,%20Thibaud&SMETS,%20Erik&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée