Efeitos da luz, temperatura e estresse de água na germinação de sementes de Caesalpinia peltophoroides benth. (Caesalpinoideae)

Abstract

Seeds of Caesalpinia peltophoroides absorb water and reach rapidly 56% of their water content after 9 hours. They lose water slowly, requiring 20 hours to completely lose imbibed water. Seeds of Caesalpinia peltophoroides germinated in the temperature range 15 to 25 °C. They did not show light sensitivity under different light types. We observed that low water potential reduced the germinability and germination rate. Under water stress those seeds were inhibited by white light mediated by phytochrome.