Superação de dormência em sementes de Sapindus saponaria L.

Abstract

The objective of this work was to verify the feasibility of pre-germination methods to overcome dormancy in S. saponaria seeds. The experiment was conducted on a private property located at Fazenda Boa Esperança, in the Municipality of São Felipe - Ba. The seeds used came from the collection of eight matrix trees located at the campus of the Federal University of Recôncavo da Bahia (UFRB), Cruz das Almas - BA. The treatments were tested: Control; mechanical scarification opposite to the hilum with number 100 sandpaper; heat treatments with dry heat and moist heat, followed or not by water at 25 °C for 24 h. A rectangular plot was used for sowing (6.54 x 1.35 x 0.20 m), under a 50% shade cloth, with 3 replications of 25 seeds. Subsequently, the variables were counted: emergence percentage (PE), emergence speed index (IVE), mean emergence time (TME), mean emergence speed (VME) and emergence speed coefficient (CVE). Data were submitted to analysis of variance (ANOVA) and the test of Scott- Knott at 5% probability, also using tests to verify residual normality and homoscedasticity. Mechanical scarification with number 100 sandpaper resulted in better efficiency to overcome dormancy in the species.