Germinação e desenvolvimento da plântula de murumuru (astrocaryummurumurumart.)

Abstract

Astrocaryummurumuru is a palm tree native to the Amazon region, it occurs both on flooded and nonflooded land areas. Traditional populations have been exploiting this species so as to extract its seeds to meet the cosmetics industriesdemand.Despite its potential, information concerning this species is still scarce. Thus, this research aimed to study the A. murumurugermination and seedling development. Therefore, it was divided into three stages. First, it sought to characterize and describe the germination and seedling development of different progenies of A. murumuru. In the present work the progeny of A. murumuru showed different behavior for all observed variables. Furthermore, the germination and seedling development process took too long, even with the endocarp being removed, taking in average 51 and 219 days to reach the germinating bud stage and the third expanded eophyll, relatively. Lipids were theA. murumuru seed’s most expressive constituents, followed by soluble sugars, proteins and starch, which had lower participation. In the third step, the A. murumuru seeds’ germination was assessed in different stratification thermal conditions. Stratification under the temperature of 40 ° C for 3 hours / day has shown to provide the best performance as to A. murumurugermination (formation of germinal button) and emergency (appearance of the first cataphyll).