| hal.structure.identifier | Universidade Federal de São Paulo | |
| dc.contributor.author | DE SOUZA MATEUS, Nikolas | |
| hal.structure.identifier | Universidade Federal Rural da Amazônia [UFRA] | |
| dc.contributor.author | OLIVEIRA FERREIRA, Eric Victor | |
| hal.structure.identifier | Universidade Federal de São Paulo | |
| dc.contributor.author | FLORENTINO, Antonio Leite | |
| hal.structure.identifier | Instituto de Pesquisas e Estudos Florestais [IPEF] | |
| dc.contributor.author | VICENTE FERRAZ, Alexandre | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | DOMEC, Jean-Christophe | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | JORDAN-MEILLE, Lionel | |
| hal.structure.identifier | Universidade Federal de São Paulo | |
| dc.contributor.author | BENDASSOLLI, José Albertino | |
| hal.structure.identifier | Universidade Federal de São Paulo | |
| dc.contributor.author | MORAES GONÇALVES, José Leonardo | |
| hal.structure.identifier | Universidade Federal de São Paulo | |
| dc.contributor.author | LAVRES, José | |
| dc.date.accessioned | 2024-04-08T11:48:58Z | |
| dc.date.available | 2024-04-08T11:48:58Z | |
| dc.date.issued | 2022 | |
| dc.identifier.issn | 0829-318X | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/195319 | |
| dc.description.abstractEn | The 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.iso | en | |
| dc.publisher | Oxford University Press (OUP) | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.subject.en | carbon and nitrogen leaf isotopes | |
| dc.subject.en | K-nutrition | |
| dc.subject.en | leaf gas exchange parameters | |
| dc.subject.en | water deficit | |
| dc.title.en | Potassium supply modulates Eucalyptus leaf water-status under PEG-induced osmotic stress: integrating leaf gas exchange, carbon and nitrogen isotopic composition and plant growth | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1093/treephys/tpab095 | |
| dc.subject.hal | Sciences de l'environnement | |
| bordeaux.journal | Tree Physiology | |
| bordeaux.page | 59 - 70 | |
| bordeaux.volume | 42 | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.issue | 1 | |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03562514 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03562514v1 | |
| bordeaux.COinS | ctx_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 | |
