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Potassium supply modulates Eucalyptus leaf water-status under PEG-induced osmotic stress: integrating leaf gas exchange, carbon and nitrogen isotopic composition and plant growth

hal.structure.identifierUniversidade Federal de São Paulo
dc.contributor.authorDE SOUZA MATEUS, Nikolas
hal.structure.identifierUniversidade Federal Rural da Amazônia [UFRA]
dc.contributor.authorOLIVEIRA FERREIRA, Eric Victor
hal.structure.identifierUniversidade Federal de São Paulo
dc.contributor.authorFLORENTINO, Antonio Leite
hal.structure.identifierInstituto de Pesquisas e Estudos Florestais [IPEF]
dc.contributor.authorVICENTE FERRAZ, Alexandre
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDOMEC, Jean-Christophe
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorJORDAN-MEILLE, Lionel
hal.structure.identifierUniversidade Federal de São Paulo
dc.contributor.authorBENDASSOLLI, José Albertino
hal.structure.identifierUniversidade Federal de São Paulo
dc.contributor.authorMORAES GONÇALVES, José Leonardo
hal.structure.identifierUniversidade Federal de São Paulo
dc.contributor.authorLAVRES, José
dc.date.accessioned2024-04-08T11:48:58Z
dc.date.available2024-04-08T11:48:58Z
dc.date.issued2022
dc.identifier.issn0829-318X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195319
dc.description.abstractEnThe objective of this study was to quantify the effect of potassium (K) supply on osmotic adjustment and drought avoidance mechanisms of Eucalyptus seedlings growing under short-term water stress. The effects of K supply on plant growth, nutritional status, leaf gas exchange parameters, leaf water potential (Psi(w)), leaf area (LA), stomatal density (SD), leaf carbon (C) and nitrogen (N) isotopic compositions (delta C-13 and delta N-15 parts per thousand) and leaf C/N ratio under polyethylene glycol (PEG)-induced water deficit were measured. Under both control (non-PEG) and osmotic stress (+PEG) conditions, K supply increased plant growth, boosting dry matter yield with decreased C/N leaf ratio and delta N-15 parts per thousand values. The +PEG significantly reduced LA, plant growth, dry matter yield, Psi(w), number of stomata per plant and leaf gas exchange, relative to non-PEG condition. Potassium supply alleviated osmotic-induced alterations in Eucalyptus seedlings by better regulating leaf development as well as SD, thus improving the rate of leaf gas exchange parameters, mesophyll conductance to CO2 (lower delta C-13 parts per thousand values) and water use efficiency (WUE). Consequently, K-supplied plants under drought better acclimated to osmotic stress than K-deficient plants, which in turn induced lower CO2 assimilation and dry matter yield, as well as higher leaf delta C-13 parts per thousand and delta N-15 parts per thousand values. In conclusion, management practices should seek to optimize K-nutrition to improve WUE, photosynthesis-related parameters and plant growth under water deficit conditions.
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.encarbon and nitrogen leaf isotopes
dc.subject.enK-nutrition
dc.subject.enleaf gas exchange parameters
dc.subject.enwater deficit
dc.title.enPotassium supply modulates Eucalyptus leaf water-status under PEG-induced osmotic stress: integrating leaf gas exchange, carbon and nitrogen isotopic composition and plant growth
dc.typeArticle de revue
dc.identifier.doi10.1093/treephys/tpab095
dc.subject.halSciences de l'environnement
bordeaux.journalTree Physiology
bordeaux.page59 - 70
bordeaux.volume42
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue1
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-03562514
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03562514v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tree%20Physiology&rft.date=2022&rft.volume=42&rft.issue=1&rft.spage=59%20-%2070&rft.epage=59%20-%2070&rft.eissn=0829-318X&rft.issn=0829-318X&rft.au=DE%20SOUZA%20MATEUS,%20Nikolas&OLIVEIRA%20FERREIRA,%20Eric%20Victor&FLORENTINO,%20Antonio%20Leite&VICENTE%20FERRAZ,%20Alexandre&DOMEC,%20Jean-Christophe&rft.genre=article


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