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	Provedor de dados Zoologia (1) BABT (1) BJMBR (1) Autor Andreo,C.S. (1) Casati,P. (1) Colli,Áurea M. T. (1) Donatti,Lucélia (1) Drincovich,M.F. (1) Edwards,G.E. (1) Fanta,Edith (1) Perez,Sonia C. J. G. de A. (1) Mais... Palavra-chave Red light (3) Far-red light (2) C4 photosynthesis (1) Fish (1) Germination (1) Morphology (1) NADP-malic enzyme (1) Photosynthesis (1) Pteridophyte (1) Retina (1) Spores (1) UV-B radiation (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 1999 (3) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última The effect of red light on the germination of a Brazilian Pteridophyte BABT Colli,Áurea M. T.; Perez,Sonia C. J. G. de A.. The effects of red light on the germination of spores of Cheilantes concolor Langsd & Fisch were investigated in this study. The spores were spread in the Mohr (1956) nutritional solution after Dyer’s modifications (1979). Three Petri dishes were used for each treatment, three slides per dish were made for each day of treatment, and one hundred spores per slide were counted . Germination of the spores in the dark was not observed. In relation to the photoperiods, the highest germination percentage and index values were obtained with the exposure of the spores to photoperiods of 8h, and the lowest values were obtained with their exposure to photoperiods of 2h. The phytochrome pigment acts in the germination of the spores through low fluency... Tipo: Info:eu-repo/semantics/article Palavras-chave: Germination; Red light; Far-red light; Spores; Pteridophyte. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200006 Regulation of the expression of NADP-malic enzyme by UV-B, red and far-red light in maize seedlings BJMBR Casati,P.; Drincovich,M.F.; Edwards,G.E.; Andreo,C.S.. The induction of nicotinamide adenine dinucleotide phosphate-malic enzyme (NADP-ME) in etiolated maize (Zea mays) seedlings by UV-B and UV-A radiation, and different levels of photosynthetically active radiation (PAR, 400-700 nm) was investigated by measuring changes in activity, protein quantity and RNA levels as a function of intensity and duration of exposure to the different radiations. Under low levels of PAR, exposure to UV-B radiation but not UV-A radiation for 6 to 24 h caused a marked increase in the enzyme levels similar to that observed under high PAR in the absence of UV-B. UV-B treatment of green leaves following a 12-h dark period also caused an increase in NADP-ME expression. Exposure to UV-B radiation for only 5 min resulted in a rapid... Tipo: Info:eu-repo/semantics/article Palavras-chave: C4 photosynthesis; NADP-malic enzyme; UV-B radiation; Photosynthesis; Red light; Far-red light. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000002 Morphology of the retina in the freshwater fish Metynnis roosevelti Eigenmann (Characidae, Serrasalminae) and the effects of monochromatic red light Zoologia Donatti,Lucélia; Fanta,Edith. The retina of Metynnis roosevelti Eigenmann, 1915, a very active freshwater fish, was investigated by light and electron microscopy and was found to have a complex neuronal structure that allows rapid responses of visual stimuli. Retina photoreceptors are double cones, single long cones, single short cones and rods. Cone inner segments are arranged as mosaics. The outer nuclear layer contains small nuclei of twin cones, long and wide nuclei of long single cones, spherical large nuclei of short cones, and small dense nuclei of rods. Horizontal, amacrine, bipolar and ganglion neurones are responsible for connections and integration between photoreceptor cells and afferent neurones. The pigmented epithelium comprises a single layer of cylindrical cells each... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Retina; Morphology; Red light. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100011 Registros recuperados: 3 Primeira ... 1 ... Última

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