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	Provedor de dados BABT (2) Scientia Agricola (1) PAB (1) Autor Agostinetto,Dirceu (1) Dias-Filho,Moacyr Bernardino (1) Duarte,Ricardo Jenner (1) Langaro,Ana Claudia (1) Lemos Filho,José Pires de (1) Silva,Jessica Dias Gomes da (1) Tavechio,Washington Luiz Gomes (1) Thomaz,Sidinei Magela (1) Ulguim,André da Rosa (1) Vargas,Leandro (1) Mais... Palavra-chave Light compensation point (4) AFLP (1) Carbon assimilation (1) Chlorophyll content (1) Competitive ability (1) Dry mass partition (1) EPSPs inhibitor herbicide (1) Egeria najas (1) Euphorbia heterophylla (1) Growth (1) Pasture (1) Photosynthesis (1) Resistance to herbicide (1) Rooted macrophytes (1) Shade adaptation (1) Swietenia macrophylla (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2017 (1) 2003 (1) 2002 (1) 1998 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Morphophysiogenetic characterization of wild poinsettia biotypes with low resistance to glyphosate PAB Agostinetto,Dirceu; Ulguim,André da Rosa; Vargas,Leandro; Silva,Jessica Dias Gomes da; Langaro,Ana Claudia. Abstract: The objective of this work was to compare wild poinsettia (Euphorbia heterophylla) biotypes as to their morphological characteristics, as well as to determine their genetic similarity in the state of Rio Grande do Sul, Brazil, and to confront the light compensation point of susceptible biotypes and of biotypes with low-resistance level to glyphosate. Besides the morphology analysis, the study included the genetic characterization, by AFLP, of susceptible (GR50= 58.65 g ha-1 a.e.) biotypes and of biotypes with low resistance (GR50= 310.36 g ha-1 a.e.) to glyphosate. The competitive ability of the biotypes was inferred according to their light compensation point. The observed morphological characteristics do not allow to differentiate biotypes as... Tipo: Info:eu-repo/semantics/article Palavras-chave: Euphorbia heterophylla; AFLP; Competitive ability; EPSPs inhibitor herbicide; Light compensation point; Resistance to herbicide. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100987 Photosynthetic light response of the C4 grasses Brachiaria brizantha and B. humidicola under shade Scientia Agricola Dias-Filho,Moacyr Bernardino. Forage grasses in tropical pastures can be subjected to considerable diurnal and seasonal reductions in available light. To evaluate the physiological behavior of the tropical forage grasses Brachiaria brizantha cv. Marandu and B. humidicola to low light, the photosynthetic light response and chlorophyll contents of these species were compared for plants grown outdoors, on natural soil, in pots, in full sunlight and those shaded to 30 % of full sunlight, over a 30-day period. Both species showed the ability to adjust their photosynthetic behavior in response to shade. Photosynthetic capacity and light compensation point were lower for shade plants of both species, while apparent quantum yield was unaffected by the light regime. Dark respiration and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon assimilation; Chlorophyll content; Light compensation point; Pasture. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000100009 Seed reserves partition and light compensation point of mahogany (Swietenia macrophylla King) seedlings growth under low photosynthetic active radiation BABT Lemos Filho,José Pires de; Duarte,Ricardo Jenner. The aim of this study was to verify the dry mass partition of the seed reserves during the initial growth of Swietenia macrophylla seedlings, in the dark, and at low levels of photosynthetically active radiation: 0.125; 3.12 and 52 µ mol.m-2.s-1. After 50 days, the dry mass of the seed reserves did not differ with treatments, but the total dry mass and leaf area were higher in the seedlings under higher light treatment. No difference in root/shoot ratio was observed between treatments, but the leaf area ratio was lower at higher light. Only the seedlings grown at 52 µ mol.m-2.s-1 showed a positive dry mass increase in relation to the mobilized seed reserves. With the values of the net increase of the seedling mass, a linear equation was adjusted in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Swietenia macrophylla; Dry mass partition; Light compensation point; Shade adaptation. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000200006 Effects of light on the growth and photosynthesis of Egeria najas planchon BABT Tavechio,Washington Luiz Gomes; Thomaz,Sidinei Magela. Photosynthesis and growth of Egeria najas (Hydrocharitaceae) from a subtropical reservoir (Itaipu Reservoir, Brazil-Paraguay) were measured in response to low light intensities (0-124 µM m-2 s-1 PAR) in the laboratory. Photosynthesis approached saturation in the range of light intensities used and light compensation point was reached at ca. 6-22 µM m-2 s-1 PAR, indicating that this species had a low light requirement for growth. Light stimulated shoot and root relative growth rates (RGR) but it was not related to ratios between root:shoot RGR. Laboratory observations indicated that (i) both shoot and root growth were simultaneously stimulated by light and (ii) the low light requirements of E. najas may explain its incidence in the Itaipu Reservoir, where... Tipo: Info:eu-repo/semantics/article Palavras-chave: Egeria najas; Photosynthesis; Growth; Light compensation point; Rooted macrophytes. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200011 Registros recuperados: 4 Primeira ... 1 ... Última

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