Physiological analysis of leaf senescence of two rice cultivars with different yield potential
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/2160 |
Resumo: | The objective of this work was to evaluate the physiological changes that occur in different leaves during the early and late grain-filling stages of two rice genotypes (Oryza sativa subsp. indica, BRS Pelota cultivar, and O. sativa subsp. japonica, BRS Firmeza cultivar), which present differences in grain yield potential. The plants were cultivated in greenhouse. Pigment content, chlorophyll fluorescence, electron transport and oxygen evolution rate were determined in the grain-filling stage, from the first to the forth leaf (top to bottom). Pigment content, photochemical efficiency of photosystem II and electron transport decreased significantly according to the position of leaves in 'BRS Pelota'. The BRS Firmeza cultivar shows higher pigment content and higher activity of the photosynthetic apparatus in comparison to 'BRS Pelota' during the grain-filling stage. |
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Physiological analysis of leaf senescence of two rice cultivars with different yield potentialAnálise fisiológica da senescência foliar de duas cultivares de arroz com diferentes potenciais de produtividadeOryza sativa; oxygen evolution rate; photochemical quenching; photosystem II; photochemicol efficiency; stay greenOryza sativa; taxa de evolução de oxigênio; extinção fotoquímica; fotossistema II; eficiência fotoquímica; senescência retardadaThe objective of this work was to evaluate the physiological changes that occur in different leaves during the early and late grain-filling stages of two rice genotypes (Oryza sativa subsp. indica, BRS Pelota cultivar, and O. sativa subsp. japonica, BRS Firmeza cultivar), which present differences in grain yield potential. The plants were cultivated in greenhouse. Pigment content, chlorophyll fluorescence, electron transport and oxygen evolution rate were determined in the grain-filling stage, from the first to the forth leaf (top to bottom). Pigment content, photochemical efficiency of photosystem II and electron transport decreased significantly according to the position of leaves in 'BRS Pelota'. The BRS Firmeza cultivar shows higher pigment content and higher activity of the photosynthetic apparatus in comparison to 'BRS Pelota' during the grain-filling stage.O objetivo deste trabalho foi avaliar as mudanças fisiológicas que ocorrem em diferentes folhas durante o início e o final do estádio de enchimento de grãos em dois genótipos de arroz (Oryza sativa subsp. indica cultivar BRS Pelota e O. sativa subsp. japonica cultivar BRS Firmeza) que apresentam diferenças no potencial de produção de grãos. As plantas foram cultivadas em casa de vegetação. Os teores de pigmentos, a fluorescência da clorofila e a taxa de liberação de oxigênio foram determinados no estádio de enchimento de grão da primeira à quarta folha (do topo à base). O teor de pigmentos, a eficiência fotoquímica do fotossistema II e o transporte de elétrons decresceram significativamente de acordo com a posição das folhas na cultivar BRS Pelota. A cultivar BRS Firmeza apresentou maior teor de pigmentos e maior atividade do aparato fotossintético em comparação à 'BRS Pelota' durante o estádio de enchimento de grão.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária Brasileiracapes, CNPqFalqueto, Antelmo RalphCassol, DanielaJúnior, Ariano Martins de MagalhãesOliveira, Antônio Costa deBacarin, Marcos Antonio2010-11-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/2160Pesquisa Agropecuaria Brasileira; v.44, n.7, jul. 2009; 695-700Pesquisa Agropecuária Brasileira; v.44, n.7, jul. 2009; 695-7001678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/2160/6202https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2160/1555info:eu-repo/semantics/openAccess2012-06-17T11:50:45Zoai:ojs.seer.sct.embrapa.br:article/2160Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-06-17T11:50:45Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential Análise fisiológica da senescência foliar de duas cultivares de arroz com diferentes potenciais de produtividade |
title |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential |
spellingShingle |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential Falqueto, Antelmo Ralph Oryza sativa; oxygen evolution rate; photochemical quenching; photosystem II; photochemicol efficiency; stay green Oryza sativa; taxa de evolução de oxigênio; extinção fotoquímica; fotossistema II; eficiência fotoquímica; senescência retardada |
title_short |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential |
title_full |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential |
title_fullStr |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential |
title_full_unstemmed |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential |
title_sort |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential |
author |
Falqueto, Antelmo Ralph |
author_facet |
Falqueto, Antelmo Ralph Cassol, Daniela Júnior, Ariano Martins de Magalhães Oliveira, Antônio Costa de Bacarin, Marcos Antonio |
author_role |
author |
author2 |
Cassol, Daniela Júnior, Ariano Martins de Magalhães Oliveira, Antônio Costa de Bacarin, Marcos Antonio |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
capes, CNPq |
dc.contributor.author.fl_str_mv |
Falqueto, Antelmo Ralph Cassol, Daniela Júnior, Ariano Martins de Magalhães Oliveira, Antônio Costa de Bacarin, Marcos Antonio |
dc.subject.por.fl_str_mv |
Oryza sativa; oxygen evolution rate; photochemical quenching; photosystem II; photochemicol efficiency; stay green Oryza sativa; taxa de evolução de oxigênio; extinção fotoquímica; fotossistema II; eficiência fotoquímica; senescência retardada |
topic |
Oryza sativa; oxygen evolution rate; photochemical quenching; photosystem II; photochemicol efficiency; stay green Oryza sativa; taxa de evolução de oxigênio; extinção fotoquímica; fotossistema II; eficiência fotoquímica; senescência retardada |
description |
The objective of this work was to evaluate the physiological changes that occur in different leaves during the early and late grain-filling stages of two rice genotypes (Oryza sativa subsp. indica, BRS Pelota cultivar, and O. sativa subsp. japonica, BRS Firmeza cultivar), which present differences in grain yield potential. The plants were cultivated in greenhouse. Pigment content, chlorophyll fluorescence, electron transport and oxygen evolution rate were determined in the grain-filling stage, from the first to the forth leaf (top to bottom). Pigment content, photochemical efficiency of photosystem II and electron transport decreased significantly according to the position of leaves in 'BRS Pelota'. The BRS Firmeza cultivar shows higher pigment content and higher activity of the photosynthetic apparatus in comparison to 'BRS Pelota' during the grain-filling stage. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-11-18 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/2160 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/2160 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/2160/6202 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2160/1555 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.44, n.7, jul. 2009; 695-700 Pesquisa Agropecuária Brasileira; v.44, n.7, jul. 2009; 695-700 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416676750917632 |