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The ideal percentage of K substitution by Na in Eucalyptus seedlings: evidences from leaf carbon isotopic composition, leaf gas exchanges 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.authorVICTOR DE OLIVEIRA FERREIRA, Eric
hal.structure.identifierUniversidade Federal Rural do Rio de Janeiro [UFRRJ]
dc.contributor.authorARTHUR JUNIOR, José Carlos
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.authorLEONARDO DE MORAES GONÇALVES, José
hal.structure.identifierUniversidade Federal de São Paulo
dc.contributor.authorLAVRES, José
dc.date.accessioned2024-04-08T12:05:35Z
dc.date.available2024-04-08T12:05:35Z
dc.date.issued2019
dc.identifier.issn0981-9428
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196364
dc.description.abstractEnPotassium (K) is the most required macronutrient by Eucalyptus, while sodium (Na) can partially substitute some physiological functions of K and have a positive response on plant growth in K-depleted tropical soils. However, the right percentage of K substitution by Na is not yet known for Eucalyptus seedlings, since a few experiments have only compared treatments receiving K or Na. This study evaluated five levels of Na supply (0, 0.45, 0.90, 1.35 and 1.80 mM) as substitution for K in Eucalyptus seedlings grown in nutrient solution. Plants growth, biomass, K-nutritional status, leaf gas exchange, leaf carbon isotopic composition (δ13C ‰), leaf water potential (Ψw), leaf area (LA), stomatal density (SD) and water use efficiency (WUE) were measured. The highest total biomass yield was achieved by the Na estimated rate of 0.25 mM, corresponding to a leaf K: Na ratio of 3.41, and having the lowest δ13C values. Conversely, the highest Na rate (1.8 mM) induced K deficiency symptoms, lower growth, reduced total dry matter yield, leaf gas exchange, LA, SD and a higher δ13C, which presented a trend to an inverse correlation with CO2 assimilation rate (A), WUE and shoot dry matter. Collectively, our results conclude that substitution of 25% of K by Na (0.45 mM of Na) provided significant gains in nutritional status and positive plant physiological responses by increasing WUE, stomatal diffusion, and by augmenting CO2 uptake efficiency. This nutritional management can therefore be an alternative option to optimize yields and resource use efficiencies in Eucalyptus cultivation.
dc.language.isoen
dc.publisherElsevier
dc.subject.enK deficiency
dc.subject.enleaf water potential
dc.subject.entree nutrition
dc.subject.enwater use efficiency
dc.title.enThe ideal percentage of K substitution by Na in Eucalyptus seedlings: evidences from leaf carbon isotopic composition, leaf gas exchanges and plant growth
dc.typeArticle de revue
dc.identifier.doi10.1016/j.plaphy.2019.02.006
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
bordeaux.journalPlant Physiology and Biochemistry
bordeaux.page102-112
bordeaux.volume137
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02622283
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02622283v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant%20Physiology%20and%20Biochemistry&rft.date=2019&rft.volume=137&rft.spage=102-112&rft.epage=102-112&rft.eissn=0981-9428&rft.issn=0981-9428&rft.au=DE%20SOUZA%20MATEUS,%20Nikolas&VICTOR%20DE%20OLIVEIRA%20FERREIRA,%20Eric&ARTHUR%20JUNIOR,%20Jos%C3%A9%20Carlos&DOMEC,%20Jean-Christophe&JORDAN-MEILLE,%20Lion&rft.genre=article


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