potencial fisiológico de sementes de clitoria fairchildiana r. a. howard. - fabaceae submetidas a diferentes regimes de luz e temperatura physiological potential of clitoria fairchildiana r. a. howard. seeds - fabaceae under different light regimes and temperature
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2012
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Abstract
Clitoria fairchildiana Howard, nativa da região amazônica, é bastante utilizada em programas de reflorestamento, na arborização de ruas, praças públicas, rodovias e estacionamentos, devido à sua copa larga e frondosa e ao seu rápido crescimento. Dessa forma, o objetivo neste trabalho foi estudar a influência de regimes de luz e temperaturas na germinação e no vigor de sementes de C. fairchildiana. Avaliou-se o potencial fisiológico das sementes sob temperaturas constantes (25 e 30°C) e alternada (20-30°C) em diferentes regimes de luz: branca, verde, vermelho-distante, vermelha e ausência de luz. O delineamento experimental foi inteiramente casualizado, em esquema fatorial 3x5, em quatro repetições. As variáveis analisadas foram: porcentagem de germinação, primeira contagem e índice de velocidade de germinação (IVG), bem como comprimento e massa seca de parte aérea e raízes das plântulas. As sementes de C. fairchildiana germinam no escuro e em todos os regimes de luz, independente da temperatura utilizada, sendo consideradas fotoblásticas neutras. Para avaliação do vigor dessas sementes, recomenda-se a temperatura de 30°C no regime de luz branca.
Clitoria fairchildiana Howard, a native of the Amazon region is widely used in reforestation programs, planting trees in the streets, public squares, roads and parking lots because of its broad and leafy canopy and its rapid growth. Thus, the objective was to study the influence of light and temperature regimes on germination and vigor of C. fairchildiana seeds. We evaluated the physiological potential of seeds under constant temperatures (25 and 30°C) and alternating (20-30°C) in different light regimes: white, green, far-red, red and darkness. The experimental design was completely randomized in a factorial 3x5, with four replications. The variables analyzed were: germination percentage, first count and germination speed index (GSI), as well as length and dry mass of shoots and primary roots of seedlings. C. fairchildiana seeds germinate in the dark and in all light regimes, regardless of the temperature used and are considered neutral photoblastic. To evaluate the effect of these seeds is recommended temperature of 30°C in the regime of white light, except for the test seedling dry weight, which indicated the green light, far-red or dark.
Clitoria fairchildiana Howard, a native of the Amazon region is widely used in reforestation programs, planting trees in the streets, public squares, roads and parking lots because of its broad and leafy canopy and its rapid growth. Thus, the objective was to study the influence of light and temperature regimes on germination and vigor of C. fairchildiana seeds. We evaluated the physiological potential of seeds under constant temperatures (25 and 30°C) and alternating (20-30°C) in different light regimes: white, green, far-red, red and darkness. The experimental design was completely randomized in a factorial 3x5, with four replications. The variables analyzed were: germination percentage, first count and germination speed index (GSI), as well as length and dry mass of shoots and primary roots of seedlings. C. fairchildiana seeds germinate in the dark and in all light regimes, regardless of the temperature used and are considered neutral photoblastic. To evaluate the effect of these seeds is recommended temperature of 30°C in the regime of white light, except for the test seedling dry weight, which indicated the green light, far-red or dark.
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alves2012cinciapotencial
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| Authors | ;Magnólia Martins Alves;Edna Ursulino Alves;Riselane de Lucena Alcântara Bruno;Katiane da Rosa Gomes da Silva;Sueli da Silva Santos-Moura;Leandra Matos Barrozo;Luciana Rodrigues de Araújo |
| Journal | Trials |
| Year | 2012 |
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