Germinação de sementes de Senegalia bahiensis (Benth.) Seigler.& Ebinger sob diferentes temperaturas

Abstract

The Senegalia bahiensis a species native to of the Northeast region that belongs to the family Fabaceae and subfamily Mimosoideae, popularly known as Senegalia, white jurema or hawthorn. It is an arboreal species, endemic and widely distributed in the Caatinga. The present study aimed to study the germination behavior of S. bahiensis, subjected to different temperatures, thus to define the best temperature for germination tests of the species. The seeds were collected in fifteen matrices the region of Casto Alves. The experiment was a completely randomized design (DIC) distributed in 15 x 3 factorial scheme, fifteen matrices and three temperatures (25 ° C, 30 ° C and alternate 25-30 ° C), totaling 45 treatments with three repetition of 25 seeds. The germination test was conducted at Biochemical Oxygen Demand germination type (BOD) with continuous light, in rolls of paper germitest. Were performed four score in the second, third, fifth and seventh day after beginning the test. It was evaluated the percentage of normal seedling (% G), germination speed index (IVG) and dry weight. The optimum germination temperature was 30 ° C being more suitable for the germination of Senegalia bahiensis tests.