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dc.contributor.authorPradier, Céline
dc.contributor.authorHinsinger, Philippe
dc.contributor.authorLaclau, Jean-Paul
dc.contributor.authorBouillet, Jean-Pierre
dc.contributor.authorGuerrini, Irae Amaral [UNESP]
dc.contributor.authorGonçalves, José Leonardo Moraes
dc.contributor.authorAsensio, Verónica
dc.contributor.authorAbreu-Junior, Cassio H.
dc.contributor.authorJourdan, Christophe
dc.date.accessioned2018-12-11T17:30:25Z
dc.date.available2018-12-11T17:30:25Z
dc.date.issued2017-05-01
dc.identifierhttp://dx.doi.org/10.1007/s11104-016-3107-7
dc.identifier.citationPlant and Soil, v. 414, n. 1-2, p. 339-354, 2017.
dc.identifier.issn1573-5036
dc.identifier.issn0032-079X
dc.identifier.urihttp://hdl.handle.net/11449/178452
dc.description.abstractBackground and aims: Comparing root functioning under contrasting rainfall regimes can help assessing the capacity of plant species to cope with more intense and frequent drought predicted under climate change context. While the awareness of the need to study the whole root system is growing, most of the studies of root functioning through rhizosphere analyses have been restricted to the topsoil. Our study aimed to assess whether the depth in the soil and the rainfall amount affect root functioning, and notably the fate of nutrients within the rhizosphere. Methods: We compared pH and nutrient availability within the rhizosphere and bulk soil along a 4-m deep soil profile in a 5-year-old eucalypt (Eucalyptus grandis) plantation under undisturbed and reduced rainfall treatments. Results: The exchangeable K concentration and the pH of the bulk soil were not influenced by the reduced rainfall treatment. By contrast, the H3O+ concentration in the rhizosphere was significantly greater than that of the bulk soil, only in the reduced rainfall plot. The concentrations of exchangeable K in the rhizosphere were significantly larger than those of the bulk soil in both treatments but this difference was higher in the reduced rainfall plot, notably below the depth of 2 m. Both exchangeable K and H3O+ concentration significantly increased within the rhizosphere in the reduced rainfall treatment at soil depth down to 4 m. Conclusions: The amount of K brought to the roots by mass flow was estimated and could not explain the observed increase in exchangeable K concentration within the rhizosphere. A more likely explanation was root-induced weathering of K-bearing minerals, partly related to enhanced rhizosphere acidification. Our results demonstrate that root functioning can be considerably altered as a response to drought down to large depths.en
dc.description.sponsorshipAgence Nationale de la Recherche
dc.description.sponsorshipCentre de Coopération Internationale en Recherche Agronomique pour le Développement
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipUniversidade de São Paulo
dc.format.extent339-354
dc.language.isoeng
dc.relation.ispartofPlant and Soil
dc.sourceScopus
dc.subjectEucalyptus grandis
dc.subjectExchangeable potassium cation
dc.subjectFine root
dc.subjectpH
dc.subjectSoil depth
dc.titleRainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazilen
dc.typeArtigo
dc.contributor.institutionUMR Eco&Sols
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionESALQ
dc.description.affiliationCIRAD UMR Eco&Sols, 2 Place Viala
dc.description.affiliationINRA UMR Eco&Sols, 2 Place Viala
dc.description.affiliationFCA UNESP
dc.description.affiliationLCF ESALQ
dc.description.affiliationCENA ESALQ
dc.description.affiliationUnespFCA UNESP
dc.identifier.doi10.1007/s11104-016-3107-7
dc.rights.accessRightsAcesso aberto
dc.description.sponsorshipIdAgence Nationale de la Recherche: ANR-13-AGRO-0005
dc.description.sponsorshipIdFAPESP: 2013/25998-4
dc.identifier.scopus2-s2.0-85001828637
dc.identifier.file2-s2.0-85001828637.pdf
unesp.author.orcid0000-0001-9857-3269[9]
dc.relation.ispartofsjr1,361
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