Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5433/1679-0359.2014v35n2p735 http://hdl.handle.net/11449/117604 |
Resumo: | The 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. |
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Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliarGas exchange and photochemical efficiency of cotton cultivars under leaf application of siliconGossypium hirsutum L.leaf nutritionphotosynthesispotassium silicateThe 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.UNESP, Jaboticabal, SP, BrazilEMBRAPA, Empresa Brasileira Pesquisa Agr, Campina Grande, PB, BrazilUEPB, Campina Grande, PB, BrazilUniv Fed Campina Grande, Campina Grande, PB, BrazilUEPB, Areia, PB, BrazilUNESP, Jaboticabal, SP, BrazilUniv Estadual LondrinaUniversidade Estadual Paulista (Unesp)Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)UEPBUniv Fed Campina GrandeSouza Ferraz, Rener Luciano de [UNESP]Macedo Beltrao, Napoleao Esberard deMelo, Alberto Soares de [UNESP]Magalhaes, Ivomberg DouradoFernandes, Pedro DantasRocha, Maria do Socorro2015-03-18T15:56:32Z2015-03-18T15:56:32Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article735-748application/pdfhttp://dx.doi.org/10.5433/1679-0359.2014v35n2p735Semina-ciencias Agrarias. Londrina: Univ Estadual Londrina, v. 35, n. 2, p. 735-748, 2014.1676-546Xhttp://hdl.handle.net/11449/11760410.5433/1679-0359.2014v35n2p735WOS:000340334100015WOS000340334100015.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporSemina-ciencias Agrarias0.349info:eu-repo/semantics/openAccess2024-06-07T13:55:34Zoai:repositorio.unesp.br:11449/117604Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:25:26.841661Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar Gas exchange and photochemical efficiency of cotton cultivars under leaf application of silicon |
title |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar |
spellingShingle |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar Souza Ferraz, Rener Luciano de [UNESP] Gossypium hirsutum L. leaf nutrition photosynthesis potassium silicate |
title_short |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar |
title_full |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar |
title_fullStr |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar |
title_full_unstemmed |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar |
title_sort |
Trocas gasosas e eficiência fotoquímica de cultivares de algodoeiro herbáceo sob aplicação de silício foliar |
author |
Souza Ferraz, Rener Luciano de [UNESP] |
author_facet |
Souza Ferraz, Rener Luciano de [UNESP] Macedo Beltrao, Napoleao Esberard de Melo, Alberto Soares de [UNESP] Magalhaes, Ivomberg Dourado Fernandes, Pedro Dantas Rocha, Maria do Socorro |
author_role |
author |
author2 |
Macedo Beltrao, Napoleao Esberard de Melo, Alberto Soares de [UNESP] Magalhaes, Ivomberg Dourado Fernandes, Pedro Dantas Rocha, Maria do Socorro |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) UEPB Univ Fed Campina Grande |
dc.contributor.author.fl_str_mv |
Souza Ferraz, Rener Luciano de [UNESP] Macedo Beltrao, Napoleao Esberard de Melo, Alberto Soares de [UNESP] Magalhaes, Ivomberg Dourado Fernandes, Pedro Dantas Rocha, Maria do Socorro |
dc.subject.por.fl_str_mv |
Gossypium hirsutum L. leaf nutrition photosynthesis potassium silicate |
topic |
Gossypium hirsutum L. leaf nutrition photosynthesis potassium silicate |
description |
The 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. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01 2015-03-18T15:56:32Z 2015-03-18T15:56:32Z |
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/10.5433/1679-0359.2014v35n2p735 Semina-ciencias Agrarias. Londrina: Univ Estadual Londrina, v. 35, n. 2, p. 735-748, 2014. 1676-546X http://hdl.handle.net/11449/117604 10.5433/1679-0359.2014v35n2p735 WOS:000340334100015 WOS000340334100015.pdf |
url |
http://dx.doi.org/10.5433/1679-0359.2014v35n2p735 http://hdl.handle.net/11449/117604 |
identifier_str_mv |
Semina-ciencias Agrarias. Londrina: Univ Estadual Londrina, v. 35, n. 2, p. 735-748, 2014. 1676-546X 10.5433/1679-0359.2014v35n2p735 WOS:000340334100015 WOS000340334100015.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Semina-ciencias Agrarias 0.349 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
735-748 application/pdf |
dc.publisher.none.fl_str_mv |
Univ Estadual Londrina |
publisher.none.fl_str_mv |
Univ Estadual Londrina |
dc.source.none.fl_str_mv |
Web of Science 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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1808128511825674240 |