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A novel optimization approach incorporating non-stomatal limitations predicts stomatal behaviour in species from six plant functional types

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorGIMENO, Teresa E.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorSAAVEDRA, Noelia
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorOGÉE, Jérôme
hal.structure.identifierHawkesbury Institute for the Environment
dc.contributor.authorMEDLYN, Belinda E.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorWINGATE, Lisa
dc.date.accessioned2024-04-08T12:04:36Z
dc.date.available2024-04-08T12:04:36Z
dc.date.issued2019
dc.identifier.issn0022-0957
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196314
dc.description.abstractEnThe primary function of stomata is to minimize plant water loss while maintaining CO2 assimilation. Stomatal water loss incurs an indirect cost to photosynthesis in the form of non-stomatal limitations (NSL) via reduced carboxylation capacity (CAP) and/or mesophyll conductance (MES). Two optimal formulations for stomatal conductance (gs) arise from the assumption of each type of NSL. In reality, both NSL could coexist, but one may prevail for a given leaf ontogenetic stage or plant functional type, depending on leaf morphology. We tested the suitability of two gs formulations (CAP versus MES) on species from six plant functional types (C4 crop, C3 grass, fern, conifer, evergreen, and deciduous angiosperm trees). MES and CAP parameters (the latter proportional to the marginal water cost to carbon gain) decreased with water availability only in deciduous angiosperm trees, while there were no clear differences between leaf ontogenetic stages. Both CAP and MES formulations fit our data in most cases, particularly under low water availability. For ferns, stomata appeared to operate optimally only when subjected to water stress. Overall, the CAP formulation provided a better fit across all species, suggesting that sub-daily stomatal responses minimize NSL by reducing carboxylation capacity predominantly, regardless of leaf morphology and ontogenetic stage.
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.subjectstomatal conductance
dc.subjecttranspiration
dc.subject.enDrought
dc.subject.enfern
dc.subject.enmesophyll conductance
dc.subject.enontogeny
dc.subject.enoptimization
dc.subject.enphotosynthesis
dc.subject.enplant functional type
dc.subject.enwater use efficiency
dc.title.enA novel optimization approach incorporating non-stomatal limitations predicts stomatal behaviour in species from six plant functional types
dc.typeArticle de revue
dc.identifier.doi10.1093/jxb/erz020
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
bordeaux.journalJournal of Experimental Botany
bordeaux.page1639-1651
bordeaux.volume70
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue5
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02625702
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02625702v1
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