Red And Far Red Light
Mostrando 1-12 de 441 artigos, teses e dissertações.
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1. Germinação e vigor de sementes de Caesalpinia ferrea Mart. ex. Tul. var. ferrea submetidas a diferentes regimes de luz e temperaturas
Resumo Caesalpinia ferrea Mart.ex.Tul. var. ferrea é uma arbórea da família Fabaceae recomendada na ornamentação de parques, praças, jardins centrais de avenidas, vias públicas e estacionamentos. Nesse sentido, o objetivo desse trabalho foi avaliar a germinação e o vigor de suas sementes quando submetidas a diferentes condições de luz e temperatur
Ciênc. Florest.. Publicado em: 02/12/2019
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2. Germination of Stigmaphyllon blanchetii Seeds in Different Temperatures and Luminosity
RESUMO: O presente trabalho teve por objetivo estudar a influência da temperatura e da luz sobre a germinação das sementes de Stigmaphyllon blanchetii, conhecida popularmente como rabo-de-rato. Na primeira etapa da pesquisa, foi avaliado o efeito de três temperaturas constantes (20 oC, 25 oC e 30 oC) e uma alternada de 20-30 oC. Na segunda etapa, para si
Planta daninha. Publicado em: 04/11/2019
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3. Seed germination responses of the medicinal herb Centella asiatica
The effect of several environmental factors on germination of medicinal herb Centella asiatica was investigated. Freshly harvested seeds of C. asiatica did not germinate even after gibberellic acid (GA3) treatment and exposure to different treatments with light qualities, while two-three months old seeds exhibited germination (82%) without pre-treatment at w
Brazilian Journal of Plant Physiology. Publicado em: 2010
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4. O afilhamento da aveia afetado pela qualidade da luz em plantas sob competição / Oat tillering affected by light quality, in plants under competition
As plantas de aveia, quando cultivadas em comunidades, podem mudar sua morfologia nos primeiros estádios de desenvolvimento, devido à absorção diferencial da luz vermelha (V) e vermelha extrema (Ve). Objetivando identificar mudanças no desenvolvimento da aveia pela modificação na razão entre a luz V e Ve, foram conduzidos três experimentos com aveia
Publicado em: 2010
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5. A qualidade da luz afeta o afilhamento em plantas de trigo, quando cultivadas sob competição / Ligth quality affects tillering on wheat when grown under competition
O presente trabalho foi conduzido com o objetivo de verificar os efeitos da mudança na qualidade da luz sobre a emissão de afilhos e na sua acumulação de massa seca. A cultivar de trigo EMBRAPA 16 foi cultivada em comunidades de aproximadamente 400p"/m2, em condições naturais de radiação durante o inverno, no Sul do Brasil. No primeiro experimento (b
Publicado em: 2010
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6. Fisiologia, bioquÃmica e morfologia da germinaÃÃo de mandacaru (Cereus jamacaru D.C.) / PHYSIOLOGY, BIOCHEMISTRY AND MORPHOLOGY OF MANDACARU (Cereus jamacaru D.C.) GERMINATION
The aim of this work was to study the physiology, biochemistry and morphology of mandacaru (Cereus jamacaru D.C) germination. Firstly, we analyzed the effects of light and temperature on mandacaru germination under four light treatments (white, dark, red and far-red) associated to six different temperatures [15, 20, 20-30 (alternated), 25, 30 and 35ÂC]. The
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2009
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7. Quality of light on the germination of seeds of Tanchagem (Plantago major L.) in different periods of storage / Qualidade da luz na germinação de sementes de Tanchagem (Plantago major L.) em diferentes períodos de armazenamento
The tanchagem (Plantago major L.) originated in Europe, but adapted themselves very well in Brazil and can be found in soil of almost the entire country. In Brazil is considered diuretic, anti-diarrheal, expectorante, hemostasis and healing, being employed against upper respiratory tract infections, chronic bronchitis and as an aid in the treatment of peptic
Publicado em: 2008
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8. Crescimento e atividade fotossintetica em duas especies de lianas de uma floresta estacional semidecidual
The lianas are copious in natural and man-made clearings and it appears that these forms of life require high irradiance for development and growth. Lianas are rooted in the soil and use other plants, especially trees as support. Since these plants begin their growth on the forest floor, then ascend to the canopy, they can experience extreme differences in r
Publicado em: 2004
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9. Modelling lucerne (Medicago sativa L.) crop response to light regimes in an agroforestry system
The general goal of this research was to understand the agronomic and physiological changes of a lucerne crop in distinct physical radiation environments and to verify the potential of lucerne to grow under shaded conditions. To achieve this, the research was conducted in four main steps: (i) firstly, experimental data collection in the field using two artif
Publicado em: 2002
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10. Germinação, crescimento, atividade fotossintetica e translocação de compostos de carbono em especies arboreas tropicais : estudo comparativo e influencia de sombreamento natural
Gennination, growth, photosynthesis and translocation of carbon in tropical tree species: a comparative study and the influence of natural shade. Light has been recognized as a major factor in species replacement during secondary sucession in forests. The degree of shade tolerance may be important in detennining successional sequences, since these are condit
Publicado em: 1996
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11. Morphology and Photosynthetic Efficiency of Tobacco Leaves That Received End-of-Day Red and Far Red Light during Development 1
Shaded leaves in plant canopies receive a higher proportion of far red relative to red light than is received by unshaded leaves. Brief end-of-day irradiations with red or far red light, acting through the phytochrome system, reversibly control morphological development of tobacco plants. Leaves that received far red light for 5 minutes at the end of each da
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12. Photomanipulation of Phytochrome in Lettuce Seeds
Seeds of lettuce (Lactuca sativa L. cv. Grand Rapids) were imbibed and given either short irradiation with red or far red light prior to drying or dried under continuous red or far red light. Seeds treated with either short or continuous red germinate in darkness, whereas seeds treated with either short or continuous far red require a short exposure to red l