Pre-germination treatments for Hymenaea stigonocarpa Mart. ex Hayne seeds

• Autor(a) principal: Garcia dos Santos, Sergio Roberto
• Data de Publicação: 2016
• Outros Autores: França de Oliveira, Renata Salaro Stecca e, Cantanhede de Souza, Luciana, Revoredo da Silva, Sebastiana Dutra Souza
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biotemas (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2016v29n4p1

Hymenaea stigonocarpa, known as Jatoba-do-cerrado, belongs to the family Fabaceae (Leguminosae) and is included in the category "near threatened with extinction." It occurs in cerrado and cerradão areas, and its seeds have physical dormancy. Because of this characteristic, the aim of this study was to evaluate different pre-germination treatments and control in H. stigonocarpa seeds, namely: immersion in fire, sulfuric acid, hydrochloric acid, acetone, ether and hot water (100°C), and mechanical scarification of the seed coat by roughing with sandpaper or cutting with nail clippers and washing in running water for 2 hours. The parameters analyzed were percentage of germination, germination speed index (GSI) and the percentage of hard and firm seeds and dead seeds. The results obtained were: a) germination: boiling water and sulfuric acid were superior to the control; b) GSI: boiling water, sulfuric acid, fire and sandpaper were superior to the control and c) percentage of dead seeds was not statistically different between the different treatments and control. In conclusion, boiling water and sulfuric acid, were the best treatments, with regard to the parameters examined.