GERMINATION OF SEEDS OF Platymiscium floribundum VOG. (FABACEAE) UNDER THE INFLUENCE OF TEMPERATURES AND LIGHT

Platymiscium floribundum Vog., uma esp\ue9cie florestal pertencente \ue0 fam\uedlia Fabaceae, apresenta grande potencial para explora\ue7\ue3o econ\uf4mica e pode ser utilizada tanto no paisagismo como em reflorestamentos, na recupera\ue7\ue3o de \ue1reas degradadas e de preserva\ue7\ue3o permanente. Diante de sua import\ue2ncia, o trabalho teve como objetivo estudar a influ\ueancia da luz e temperaturas na germina\ue7\ue3o de sementes de Platymiscium floribundum. Avaliou-se a germina\ue7\ue3o e vigor das sementes sob temperaturas de 25 e 30\ubaC constantes e 20- 30\ubaC alternada em diferentes regimes de luz: branca (LB), verde (LV), vermelha-distante (LVD), vermelha (LV) e aus\ueancia de luz (A). O delineamento experimental foi inteiramente ao acaso, em esquema fatorial 3 x 5, com quatro repeti\ue7\uf5es de 25 sementes. As vari\ue1veis analisadas foram: germina\ue7\ue3o, primeira contagem de germina\ue7\ue3o, \uedndice de velocidade de germina\ue7\ue3o (IVG), comprimento e massa seca de pl\ue2ntulas (raiz e altura da parte a\ue9rea). As sementes de Platymiscium floribundum expressam seu m\ue1ximo vigor em ambiente iluminado independentemente da temperatura.Platymiscium floribundum Vog., a forest species belonging to the family Fabaceae, has great potential for economic exploitation and can be used both in landscape and in reforestation, in the restoration of degraded areas and permanent preservation.given its importance, this work was, it was aimed to study the influence of light and temperature on seed germination of Platymiscium floribundum. We evaluate the germination and vigor Under constant and alternate temperatures of 25 and 30 \ubaC in different light regimes: White (LB), green (LV), red-far (LVD), red (LV) and absence light (A). The experimental design was completely randomized in a factorial 3 x 5 with four replications of 25 seeds. The variables analyzed were: germination, first count of germination, germination speed index (IGV), length and seedling dry weight (root length, shoot length of seedlings). The seeds of Platymiscium floribundum express their maximum force in illuminated environment independent of the temperature