Afficher la notice abrégée

Drought-induced lacuna formation in the stem causes hydraulic conductance to decline before xylem embolism in Selaginella

hal.structure.identifierDepartment of Statistics [Purdue University]
dc.contributor.authorCARDOSO, Amanda
hal.structure.identifierUniversität Ulm - Ulm University [Ulm, Allemagne]
dc.contributor.authorVISEL, Dominik
hal.structure.identifierPerdue University
dc.contributor.authorKANE, Cade
hal.structure.identifierPerdue University
dc.contributor.authorBATZ, Timothy
hal.structure.identifierUniversität Ulm - Ulm University [Ulm, Allemagne]
dc.contributor.authorGARCIA SÀNCHEZ, Clara
dc.contributor.authorKAACK, Lucian
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorLAMARQUE, Laurent
hal.structure.identifierWeizmann Institute of Science [Rehovot, Israël]
dc.contributor.authorWAGNER, Yael
hal.structure.identifierSynchrotron SOLEIL [SSOLEIL]
dc.contributor.authorKING, Andrew
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorTORRES RUIZ, Jose Manuel
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCORSO, Déborath
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Regis
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorBADEL, Eric
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierUniversität Ulm - Ulm University [Ulm, Allemagne]
dc.contributor.authorJANSEN, Steven
hal.structure.identifierPerdue University
dc.contributor.authorMCADAM, Scott A. M.
dc.date.issued2020-08
dc.identifier.issn0028-646X
dc.description.abstractEnLycophytes are the earliest diverging extant lineage of vascular plants, sister to all other vas-cular plants. Given that most species are adapted to ever-wet environments, it has been hypothesized that lycophytes, and by extension the common ancestor of all vascular plants, have few adaptations to drought. We investigated the responses to drought of key fitness-related traits such as stomatal regulation , shoot hydraulic conductance (K shoot) and stem xylem embolism resistance in Selaginella haematodes and S. pulcherrima, both native to tropical understory. During drought stomata in both species were found to close before declines in K shoot , with a 50% loss of K shoot occurring at À1.7 and À2.5 MPa in S. haematodes and S. pulcherrima, respectively. Direct observational methods revealed that the xylem of both species was resistant to embolism formation, with 50% of embolized xylem area occurring at À3.0 and À4.6 MPa in S. haematodes and S. pulcherrima, respectively. X-ray microcomputed tomogra-phy images of stems revealed that the decline in K shoot occurred with the formation of an air-filled lacuna, disconnecting the central vascular cylinder from the cortex. We propose that embolism-resistant xylem and large capacitance, provided by collapsing inner cortical cells, is essential for Selaginella survival during water deficit.
dc.language.isoen
dc.publisherWiley
dc.subject.enABA
dc.subject.enembolism
dc.subject.enevolution
dc.subject.enhydraulic conductance
dc.subject.enlycophyte
dc.subject.enstomatal conductance
dc.subject.enstomatal evolution
dc.title.enDrought-induced lacuna formation in the stem causes hydraulic conductance to decline before xylem embolism in Selaginella
dc.typeArticle de revue
dc.identifier.doi10.1111/nph.16649
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalNew Phytologist
bordeaux.page1804-1817
bordeaux.volume227
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-02927433
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02927433v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2020-08&rft.volume=227&rft.issue=6&rft.spage=1804-1817&rft.epage=1804-1817&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=CARDOSO,%20Amanda&VISEL,%20Dominik&KANE,%20Cade&BATZ,%20Timothy&GARCIA%20S%C3%80NCHEZ,%20Clara&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