This work aimed to evaluate the effect of temperature, period of storage and pregerminative treatments on the emergence percentage (E %) and emergence speed index (SEI) of Jacarandá (Jacaranda cuspidifolia Mart.). The experiment was carried out in factorial 5 x 2 x 4 (5 storage periods (0, 30, 60, 90 and 150 days) C 2 temperatures (12 ± 2ºC and 25 ± 2ºC ) C 4 pregerminative treatments (1- immersion in GA 125 mg .L-1 / 24 hours; 2- immersion in GA 250 mg L-1 / 24 hours; 3- immersion in hot water; 4- control), in DIC with 5 replications of 30 seeds. The emergence increased from 29% at the first day to 79 % at the 150th day. The seeds may be stored for 150 days reaching emergence higher than 70% without any pregerminative treatment. Although there was no SEI change among the treatments after storage of seeds for 150 days under refrigeration (average 0.82), the highest value was observed with seeds kept at room temperature and treated with hot water and GA 250 mg.L-1 was 0.41.
Gibberellic acid; storage; refrigeration
