Acessibilidade / Reportar erro

Overcoming dormancy of 'umbuzeiro' seeds (Spondias tuberosa, Arr. Câm.) by using different methods

Several fruits of native species of semi-arid region have great potential for commercialization, and among them there is the Spondias tuberosa. However, commercial cultivation of this species is limited by the difficulty of obtaining seedlings mainly depending on the dormancy of its seeds. Thus, the purpose of this study was to evaluate the seeds overcoming dormancy methods of Spondias Tuberosa to promote an increase in the rates of germination, uniformity and vigor of the seedlings. Two experiments were independently conducted. The treatments of the first experiments were: test, immersion of the seeds in water for 24 hours, immersion of the seeds in solution of gibberellic acid 1000 mg / L for 24 hours, scarification of seeds with sulfuric acid PA for 10 minutes and mechanical scarification of seeds. In the second experiment, the treatments consisted of planting the seeds with 0, 30, 60, 90, 120, 150, 180 and 210 days of storage in paper bags under laboratory conditions, at an average temperature of 22.5° C and relative humidity of 65%. In the first study it was found that there was a significant effect of the methods to seeds overcoming dormancy, concluding that the mechanical scarification is the best treatment, with an average germination rate in 60 days after planting 26.6%. In the second experiment, storage positively influenced the germination of seeds and seedlings vigor. The best results for uniformity and germination percentage (83%) were obtained between 120 and 210 days of seeds storage, while for the length and fresh weight of root, between 120 and 150 days.

scarification; gibberellic acid; seeds storage; "umbu"; propagation; germination


Sociedade Brasileira de Fruticultura Via de acesso Prof. Paulo Donato Castellane, s/n , 14884-900 Jaboticabal SP Brazil, Tel.: +55 16 3209-7188/3209-7609 - Jaboticabal - SP - Brazil
E-mail: rbf@fcav.unesp.br