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	Provedor de dados Braz. J. Plant Physiol. (2) Autor Bacarin,Marcos A. (2) Falqueto,Antelmo R. (2) Braga,Eugenia J. B. (1) Cassana,Francine F. (1) Cassol,Daniela (1) Magalhães Júnior,Ariano M. (1) Oliveira,Antônio C. (1) Peters,Jose A. (1) Silva,Fabio S. P. (1) Mais... Palavra-chave Culture medium (1) JIP-test (1) Non-photochemical quenching coefficient (1) Oryza sativa (1) PSII photochemical efficiency (1) Performance index (1) Photon flux density (1) Photosystem (1) Stay green mutant rice (1) Sucrose (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2010 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Chlorophyll a fluorescence of sweet potato plants cultivated in vitro and during ex vitro acclimatization Braz. J. Plant Physiol. Cassana,Francine F.; Falqueto,Antelmo R.; Braga,Eugenia J. B.; Peters,Jose A.; Bacarin,Marcos A.. Sweet potato (Ipomoea batatas L.) plants were cultivated in vitro in Murashige and Skoog (MS) medium with 20 and 40 g L-1 of sucrose under two different photon flux densities (21 and 60 µmol m-2 s-1). Leaves developed in vitro mostly showed high variable to maximum fluorescence ratio (F V/F M) , indicating good development of photosynthetic apparatus. This ratio decreased during leaf aging, especially in the plants cultivated in vitro on medium with higher sucrose concentration and higher photon flux. Leaves developed ex vitro showed high F V/F M ratio during whole experiment. The effective photochemical efficiency (F V'/F M') was maximum at 15th day after emergence of leaves. Photosynthetic potential rate was higher in leaves developed in vitro than in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Culture medium; Photon flux density; Photosystem; Sucrose. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000300003 Chlorophyll fluorescence in rice: probing of senescence driven changes of PSII activity on rice varieties differing in grain yield capacity Braz. J. Plant Physiol. Falqueto,Antelmo R.; Silva,Fabio S. P.; Cassol,Daniela; Magalhães Júnior,Ariano M.; Oliveira,Antônio C.; Bacarin,Marcos A.. With Japonica rice BRS Firmeza and indica rice BRS Pelota (low and high grain yield, respectively) as materials, Chl content and Chl a fluorescence parameters in flag leaves from the heading to mature grain stage were investigated. The Chl content and the Chl a fluorescence were measured using a portable chlorophyll meter CL-01 and portables fluorometer Handy-PEA and FMS-2 (Hansatech, Kings Lynn, UK), respectively. All measurements were taken on middle part of the flag leaves (n = 10). The results showed that the Chl content and Chl a fluorescence parameters declined after full expansion of flag leaves in both rice cultivars. However, these biochemical and photochemical parameters did not show similar changing pattern and the behavior of flag leaves... Tipo: Info:eu-repo/semantics/article Palavras-chave: JIP-test; Non-photochemical quenching coefficient; Oryza sativa; Performance index; PSII photochemical efficiency; Stay green mutant rice. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000100004 Registros recuperados: 2 Primeira ... 1 ... Última

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