Physiological analysis of leaf senescence of two rice cultivars with different yield potential.

dc.creatorFALQUETO, A. R.
dc.creatorCASSOL, D.
dc.creatorMAGALHÃES JÚNIOR, A. M. de
dc.creatorOLIVEIRA, A. C. de
dc.creatorBACARIN, M. A.
dc.date2011-04-09T12:46:29Z
dc.date2011-04-09T12:46:29Z
dc.date2009
dc.date2010-01-28
dc.date.accessioned2017-03-06T19:27:38Z
dc.date.available2017-03-06T19:27:38Z
dc.identifier46927
dc.identifierhttp://www.alice.cnptia.embrapa.br/handle/doc/631523
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/266116
dc.descriptionAbstract ? 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.
dc.description2009
dc.languageen
dc.publisherPesquisa Agropecuária Brasileira, Brasília, DF, v. 44, n. 7, p. 695-700, jul. 2009.
dc.relationÁrea de Informação da Sede - Artigo em periódico indexado (ALICE)
dc.subjectExtinção fotoquímica
dc.subjectFotossistema II
dc.subjectEficiência fotoquímica
dc.subjectOryza sativa
dc.subjectOxigênio
dc.subjectSenescência
dc.titlePhysiological analysis of leaf senescence of two rice cultivars with different yield potential.
dc.typeArtículos de revistas


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