Superação de dormência de sementes de tento carolina (Adenanthera pavonina L.)

Abstract

Adenanthera pavonina is a species of tree plant that has multiple purposes. However, its seeds have dormancy, which makes the production of seedlings difficult. Thus, the objective of this work was to evaluate the effectiveness of different methods for breaking seed dormancy. The experimental design used was completely randomized, with four replications of twenty five plants in the plot. The dormancy breaking methods used were: non-scarified seeds (M1); seeds scarified on the side of the embryonic axis with sandpaper (M2); seeds scarified on the side opposite the embryonic axis with sandpaper (M3); scarified in water at 95ºC for 5 minutes (M4); scarified in sulfuric acid (98%) for 5 minutes (M5) and scarified in sulfuric acid for 10 minutes (M6). The characteristics evaluated were: percentage of emergence (E%) and mean time to emergence (MT). A. pavonina seeds that were submitted to mechanical scarification methods with sandpaper, both on the side of the embryonic axis (M2) and on the side opposite the embryonic axis (M3), showed the highest emergence rates 96% and 93%, respectively., in a shorter emergence time, 11.9 days, respectively, compared to the other.