Germination of seeds of Platymiscium floribundum vog. sob a influencia da luz e temperaturas
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...
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Veröffentlicht in: | Ciência florestal 2016-07, Vol.26 (3), p.971 |
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Format: | Artikel |
Sprache: | por |
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Zusammenfassung: | 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[degrees]C 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. Keywords: force; forest species; photoblastism; jacaranda. Platymiscium floribundum Vog., uma especie florestal pertencente a familia Fabaceae, apresenta grande potencial para exploracao economica e pode ser utilizada tanto no paisagismo como em reflorestamentos, na recuperacao de areas degradadas e de preservacao permanente. Diante de sua importancia, o trabalho teve como objetivo estudar a influencia da luz e temperaturas na germinacao de sementes de Platymiscium floribundum. Avaliou-se a germinacao e vigor das sementes sob temperaturas de 25 e 30[degrees]C constantes e 20- 30[degrees]C alternada em diferentes regimes de luz: branca (LB), verde (LV), vermelha- distante (LVD), vermelha (LV) e ausencia de luz (A). O delineamento experimental foi inteiramente ao acaso, em esquema fatorial 3 x 5, com quatro repeticoes de 25 sementes. As variaveis analisadas foram: germinacao, primeira contagem de germinacao, indice de velocidade de germinacao (IVG), comprimento e massa seca de plantulas (raiz e altura da parte aerea). As sementes de Platymiscium floribundum expressam seu maximo vigor em ambiente iluminado independentemente da temperatura. Palavras-chave: vigor; especie florestal; fotoblastismo; jacaranda. |
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ISSN: | 1980-5098 1980-5098 |