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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/117604
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dc.contributor.authorSouza Ferraz, Rener Luciano de-
dc.contributor.authorMacedo Beltrao, Napoleao Esberard de-
dc.contributor.authorMelo, Alberto Soares de-
dc.contributor.authorMagalhaes, Ivomberg Dourado-
dc.contributor.authorFernandes, Pedro Dantas-
dc.contributor.authorRocha, Maria do Socorro-
dc.date.accessioned2015-03-18T15:56:32Z-
dc.date.accessioned2016-10-25T20:35:45Z-
dc.date.available2015-03-18T15:56:32Z-
dc.date.available2016-10-25T20:35:45Z-
dc.date.issued2014-01-01-
dc.identifierhttp://dx.doi.org/10.5433/1679-0359.2014v35n2p735-
dc.identifier.citationSemina-ciencias Agrarias. Londrina: Univ Estadual Londrina, v. 35, n. 2, p. 735-748, 2014.-
dc.identifier.issn1676-546X-
dc.identifier.urihttp://hdl.handle.net/11449/117604-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/117604-
dc.description.abstractThe objective of this study was to evaluate gas exchange and photochemical efficiency of cotton cultivars under leaf application of silicon. Therefore, the experiment was conducted in a completely randomized in a factorial 3 x 5, three cotton cultivars ('BRS Topazio', 'BRS Safira' and 'BRS Rubi'), five silicon concentrations (0, 50, 100, 150, 200 mg L-1) and four replications. Gas exchange and photochemical efficiency were determined by measuring the rate of CO2 assimilation, transpiration, stomatal conductance, internal CO2 concentration, instantaneous efficiency in water use, instantaneous carboxylation efficiency, initial fluorescence, maximum quantum efficiency of the variable and photosystem II (PSII). The data variables were subjected to analysis of variance and regression test comparison of means. There were significant differences in gas exchange and photochemical efficiency in response to concentrations of silicon. There were also significant differences among cotton cultivars evaluated. In cultivar 'BRS Top zio', the application of silicon increased CO2 assimilation rate and quantum efficiency of PSII. In 'BRS Safira' silicon reduced the rate of assimilation and internal CO2 concentration. In 'BRS Rubi' element increased the fluorescence of chlorophyll 'a' and quantum efficiency of photosystem II, and reduced the rate of assimilation and internal CO2 concentration and stomatal conductance. Silicate fertilization provided 'BRS Topazio' to express better photosynthetic rate in relation to 'BRS Safira' and 'BRS Rubi'. No damage occurred in PSII when 'BRS Top zio', 'BRS Safira' and 'BRS Rubi' cultivars received silicon as supplementary nutrition.en
dc.format.extent735-748-
dc.language.isopor-
dc.publisherUniv Estadual Londrina-
dc.sourceWeb of Science-
dc.subjectGossypium hirsutum L.en
dc.subjectleaf nutritionen
dc.subjectphotosynthesisen
dc.subjectpotassium silicateen
dc.titleTrocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliarpt
dc.title.alternativeGas exchange and photochemical efficiency of cotton cultivars under leaf application of siliconen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
dc.contributor.institutionUEPB-
dc.contributor.institutionUniv Fed Campina Grande-
dc.description.affiliationUNESP, Jaboticabal, SP, Brazil-
dc.description.affiliationEMBRAPA, Empresa Brasileira Pesquisa Agr, Campina Grande, PB, Brazil-
dc.description.affiliationUEPB, Campina Grande, PB, Brazil-
dc.description.affiliationUniv Fed Campina Grande, Campina Grande, PB, Brazil-
dc.description.affiliationUEPB, Areia, PB, Brazil-
dc.description.affiliationUnespUNESP, Jaboticabal, SP, Brazil-
dc.identifier.doi10.5433/1679-0359.2014v35n2p735-
dc.identifier.wosWOS:000340334100015-
dc.rights.accessRightsAcesso aberto-
dc.identifier.fileWOS000340334100015.pdf-
dc.relation.ispartofSemina-ciencias Agrarias-
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