Influência da temperatura na germinação de sementes de Poincianella pyramidalis (Tul.) L. P. Queiroz

Abstract

The Poincianella pyramidalis, popularly known as catingueira belongs to the Fabaceae family, tree species, endemic and widely distributed in the Caatinga. The objective of this study was to investigate the germination behavior of P. pyramidalis, submitted to different temperatures identifying the most suitable temperature for germination tests for this species. The seeds of P. pyramidalis were collected from six matrices in the region Casto Alves and St. Terezinha. The experiment was a completely randomized design (DIC) in factorial 3 x 6, six matrices and three temperatures (25° C, 30° C and alternating 25-30° C), totaling 18 treatments with four repetition of 25 seeds. The germination test was conducted in germinators type Biochemical Oxygen Demand (BOD), with continuous light, in rolls germitest. Was counted twice in the second and seventh day after the beginning of the test. We evaluated the percentage of germination of normal plants, germination velocity index, length of shoots and roots of normal seedlings and reason of the length of the shoot and root. It was concluded that the most suitable temperature for the test germination of P. pyramidalis is 25°C.