Métodos de armazenamento e temperaturas de germinação de sementes de Delonix regia (Hook.)

Abstract

Its propagation occurs through seeds, which present dormancy due to the impermeability of the integument to water. The objective of the present work was to evaluate two types of containers for seed storage (polyethylene plastic and glass vial), germination temperature, storage tolerance at low temperatures and analyze germination percentage (G%) and speed index Of germination (IVG). The work was done in the seed laboratory of the University of Mato Grosso - Sinop Campus. Delonix regia (Hook.) Is an exotic tree species of high ornamental value adapted and widely used in Brazil. The seeds were collected in January 2016 and stored in the same month for 6 months at a temperature of -5 ° C, and these matrices are located in the municipality of Uruará - PA. Four treatments (25 ° C plastic, 25 ° C glass, 30 ° C plastic and 30 ° C glass) were used with 4 replicates of 10 seeds, checking the best temperature and packaging in the percentage of germination and also analyzing the best speed index Of germination (IVG). The results were submitted to analysis of variance and Tukey test at 5% of significance. The seeds did not present significant differences in the percentages of germination under storage conditions in the packages, but presented significant differences with IVG, with a better treatment result of 30 ° C glass.