Métodos para a superação da dormência fisiológica de Caryocar brasiliense Camb.

CERNE

Barbosa, Sandro⁴  Alves, João Mauricio Cavalcante²  Nogueira, Rairys Cravo¹  Paiva, Patrícia Duarte de Oliveira²  Dombroski, Jeferson Luiz Dallabona³  Paiva, Renato²  Santos, Breno Regis⁴ 

[1] Universidade Federal do Pará/UFPA, Altamira$$;Universidade Federal de Lavras/UFLA, Lavras$$;Universidade Federal Rural do Semi Árido, Mossoró$$;Universidade Federal de Alfenas/UNIFAL, Alfenas$$

关键词: Caryocaraceae;    dormancy breaking;    germination mean time.;   

DOI  :  10.1590/S0104-77602010000200003

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

Caryocar brasiliense is a native species from Brazilian cerrado that has a considerable economic potential. The aim of this work was verifying the effect of substances with potential for seed germination stimulation. Seeds were extracted from the endocarps and set to germinate in paper rolls moistened with the following solutions: distilled water (Control); 2mmol L^-1 KNO₃ (Nitrate); 2mmol L^-1 Etephon (ET); 1mmol L^-1 GA₃ (GA), 1mmol L^-1 GA₃ + 2mmol L^-1 Etephon (GA + ET). The germination and the germination mean time were, respectively, 54.0% and 9.3 days in the GA treatment, 47.3% and 11.0 days in the GA + ET treatment, 32.0% and 12.2 days in the Control treatment, 30.7% and 13.1 days in the Etephon treatment, and 20.1% and 13.1 days in the Nitrate treatment. Low germination rates were observed in the GA + ET treatment up to the ninth day from sowing, when compared to the GA treatment, what indicates a possible seed germination inhibition due to ethylene presence.

【 授权许可】

Unknown