Germination of tucumã (Astrocaryum aculeatum G. Mey.) as a function of thermal pretreatment and stratification temperature

Abstract: Germination of tucumã (Astrocaryum aculeatum G. Mey.) seeds is slow and although the removal endocarp favors speed process, time still considered long. Thus, this study aimed to investigate effects different pretreatment stratification temperatures on germination seeds. Two experiments were set up. The first experiment was conducted using a completely randomized design in factorial scheme seedling emergence evaluated as function diaspores at (27, 30, 35, 40 °C) during periods (20, 40, 60 days). second also seed constant (25, alternating (26 - 26 °C). decreased progressively all tested temperature increased. Seed showed results. for not effective overcoming dormancy temperatures, with highest thermal amplitude °C), favored