Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil
Main Author: | |
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Publication Date: | 2017 |
Other Authors: | , , , , , , , |
Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UNESP |
Download full: | http://dx.doi.org/10.1007/s11104-016-3107-7 http://hdl.handle.net/11449/178452 |
Summary: | Background 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. |
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Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in BrazilEucalyptus grandisExchangeable potassium cationFine rootpHSoil depthBackground 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.Agence Nationale de la RechercheCentre de Coopération Internationale en Recherche Agronomique pour le DéveloppementFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade de São PauloCIRAD UMR Eco&Sols, 2 Place VialaINRA UMR Eco&Sols, 2 Place VialaFCA UNESPLCF ESALQCENA ESALQFCA UNESPAgence Nationale de la Recherche: ANR-13-AGRO-0005FAPESP: 2013/25998-4UMR Eco&SolsUniversidade Estadual Paulista (Unesp)ESALQPradier, CélineHinsinger, PhilippeLaclau, Jean-PaulBouillet, Jean-PierreGuerrini, Irae Amaral [UNESP]Gonçalves, José Leonardo MoraesAsensio, VerónicaAbreu-Junior, Cassio H.Jourdan, Christophe2018-12-11T17:30:25Z2018-12-11T17:30:25Z2017-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article339-354application/pdfhttp://dx.doi.org/10.1007/s11104-016-3107-7Plant and Soil, v. 414, n. 1-2, p. 339-354, 2017.1573-50360032-079Xhttp://hdl.handle.net/11449/17845210.1007/s11104-016-3107-72-s2.0-850018286372-s2.0-85001828637.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPlant and Soil1,361info:eu-repo/semantics/openAccess2024-04-30T19:29:13Zoai:repositorio.unesp.br:11449/178452Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-30T19:29:13Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil |
title |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil |
spellingShingle |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil Pradier, Céline Eucalyptus grandis Exchangeable potassium cation Fine root pH Soil depth |
title_short |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil |
title_full |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil |
title_fullStr |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil |
title_full_unstemmed |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil |
title_sort |
Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil |
author |
Pradier, Céline |
author_facet |
Pradier, Céline Hinsinger, Philippe Laclau, Jean-Paul Bouillet, Jean-Pierre Guerrini, Irae Amaral [UNESP] Gonçalves, José Leonardo Moraes Asensio, Verónica Abreu-Junior, Cassio H. Jourdan, Christophe |
author_role |
author |
author2 |
Hinsinger, Philippe Laclau, Jean-Paul Bouillet, Jean-Pierre Guerrini, Irae Amaral [UNESP] Gonçalves, José Leonardo Moraes Asensio, Verónica Abreu-Junior, Cassio H. Jourdan, Christophe |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
UMR Eco&Sols Universidade Estadual Paulista (Unesp) ESALQ |
dc.contributor.author.fl_str_mv |
Pradier, Céline Hinsinger, Philippe Laclau, Jean-Paul Bouillet, Jean-Pierre Guerrini, Irae Amaral [UNESP] Gonçalves, José Leonardo Moraes Asensio, Verónica Abreu-Junior, Cassio H. Jourdan, Christophe |
dc.subject.por.fl_str_mv |
Eucalyptus grandis Exchangeable potassium cation Fine root pH Soil depth |
topic |
Eucalyptus grandis Exchangeable potassium cation Fine root pH Soil depth |
description |
Background 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. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-05-01 2018-12-11T17:30:25Z 2018-12-11T17:30:25Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s11104-016-3107-7 Plant and Soil, v. 414, n. 1-2, p. 339-354, 2017. 1573-5036 0032-079X http://hdl.handle.net/11449/178452 10.1007/s11104-016-3107-7 2-s2.0-85001828637 2-s2.0-85001828637.pdf |
url |
http://dx.doi.org/10.1007/s11104-016-3107-7 http://hdl.handle.net/11449/178452 |
identifier_str_mv |
Plant and Soil, v. 414, n. 1-2, p. 339-354, 2017. 1573-5036 0032-079X 10.1007/s11104-016-3107-7 2-s2.0-85001828637 2-s2.0-85001828637.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Plant and Soil 1,361 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
339-354 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1799965395777486848 |