ULTRASSECAGEM E ARMAZENAMENTO DE SEMENTES DE BARU (Dipteryx alata Vog.): ASPECTOS FISIOLÓGICOS E BIOQUIMICOS

Abstract

Due to the great anthropic pressure, the Cerrado has been losing its species, leading to the creation of conservation protocols. The formation of databases and germplasms that can preserve the genetic information of the species and make it available with high physiological quality, which will allow the production of large scale seedlings. are essential. However, it is necessary to know the behavior of this species in the short-term storage as long-term, and its behavior against the desiccation tolerance, in this way it was working different methods, being a slower, using silica gel and more drastic by Zeolite granules which has high water absorption index. In addition, it was also verified which temperature best corresponds to the storage and drying process of the seeds. The objective of this study was to evaluate the drying tolerance of Dipteryx Alata seeds under different drying conditions, both silica and ultra-drying system using the granules and Zeolites, during different periods of storage defined as short-term storage until 8 months and longterm up to 22 months, at a temperature of 10 ºC and 20 ºC to define the ideal conservation condition. . To verify seed behavior, water content, germination, germination speed index, emergence, emergency speed index and electrical conductivity tests were performed. In response to enzymatic behavior, oxidative stress was estimated by catalase (CAT), superoxydodismutase (SOD), peroxidase (POX), glutathione s-transferase (GST) malate aldehyde (MDA) and total proteins. The experiment was carried out in a completely randon design with statistical design, with vigor and viability evaluations for long-term storage 2x2x3 (temperature x type of drying x time), and for the biochemical evaluation the factorial design with 2x2x2 ( temperature x type of drying x time). With analytical evaluations of Tukey test and contrasts provided by Sisvar. With the results of this researcha dosed project, we intend to indicate new storage conditions and propose protocols for the conservation of seeds of Dipteryx Alata Vog.