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The effect of plant water storage on water fluxes within the coupled soil-plant system

hal.structure.identifierNicholas School of the Environment
dc.contributor.authorHUANG, Cheng-Wei
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierNicholas School of the Environment
dc.contributor.authorDOMEC, Jean-Christophe
hal.structure.identifierEnvironmental Sciences Division [Oak Ridge]
dc.contributor.authorWARD, Eric J.
hal.structure.identifierDepartment of Biological Sciences
dc.contributor.authorDUMAN, Tomer
hal.structure.identifierNicholas School of the Environment
dc.contributor.authorMANOLI, Gabriele
hal.structure.identifierDepartment of Civil, Construction, and Environmental Engineering
dc.contributor.authorPAROLARI, Anthony J.
hal.structure.identifierNicholas School of the Environment
hal.structure.identifierDepartment of Civil and Environmental Engineering
dc.contributor.authorKATUL, Gabriel G.
dc.date.accessioned2024-04-08T12:09:40Z
dc.date.available2024-04-08T12:09:40Z
dc.date.issued2017
dc.identifier.issn0028-646X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196588
dc.description.abstractEnIn addition to buffering plants from water stress during severe droughts, plant water storage (PWS) alters many features of the spatio-temporal dynamics of water movement in the soil-plant system. How PWS impacts water dynamics and drought resilience is explored using a multi-layer porous media model. The model numerically resolves soil-plant hydrodynamics by coupling them to leaf-level gas exchange and soil-root interfacial layers. Novel features of the model are the considerations of a coordinated relationship between stomatal aperture variation and whole-system hydraulics and of the effects of PWS and nocturnal transpiration (Fe,night) on hydraulic redistribution (HR) in the soil. The model results suggest that daytime PWS usage and Fe,night generate a residual water potential gradient (Δψp,night) along the plant vascular system overnight. This Δψp,night represents a non-negligible competing sink strength that diminishes the significance of HR. Considering the co-occurrence of PWS usage and HR during a single extended dry-down, a wide range of plant attributes and environmental/soil conditions selected to enhance or suppress plant drought resilience is discussed. When compared with HR, model calculations suggest that increased root water influx into plant conducting-tissues overnight maintains a more favorable water status at the leaf, thereby delaying the onset of drought stress.
dc.language.isoen
dc.publisherWiley
dc.rights.urihttp://creativecommons.org/licenses/by-sa/
dc.subjectstress hydrique
dc.subjectsensibilité à la sécheresse
dc.subjectrelation sol-plante-atmosphère
dc.subjectsystème vasculaire des plantes
dc.subject.endrought resilience
dc.subject.enhydraulic redistribution
dc.subject.enleaf-level gas exchange
dc.subject.ennocturnal transpiration
dc.subject.enplant water storage
dc.subject.enroot water uptake
dc.subject.enwater stress
dc.subject.ensoil-plant-atmosphere relationship
dc.title.enThe effect of plant water storage on water fluxes within the coupled soil-plant system
dc.typeArticle de revue
dc.identifier.doi10.1111/nph.14273
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalNew Phytologist
bordeaux.page1093-1106
bordeaux.volume213
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue3
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01605721
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01605721v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2017&rft.volume=213&rft.issue=3&rft.spage=1093-1106&rft.epage=1093-1106&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=HUANG,%20Cheng-Wei&DOMEC,%20Jean-Christophe&WARD,%20Eric%20J.&DUMAN,%20Tomer&MANOLI,%20Gabriele&rft.genre=article


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