PADRONIZAÇÃO DO TESTE DE GERMINAÇÃO PARA SEMENTES DE PINHÃO-MANSO

Abstract

It was objectified, in this work the standardization of the germination test with relationship to the temperature and the removal of the tegument for the evaluation of the seeds of pinhão-manso (Jatropha curcas L). For so much, the germination test was accomplished with four repetitions of 25 seeds for each treatment. The treatments was arranged in a complete randomized design, in outline factorial 4 x 2 (4 temperatures 20 ºC; 25 ºC; 20-30 ºC and 30 ºC, and 2 type seeds with and without tegument). The sown was accomplished in system roll, humidified with volumes of water (mL), equivalent to 2.5 times the weight of the paper (g). The treatments were installed in cameras of germination of the type BOD under regime of white light. They were appraised the germination with counts to the 10 and 15 days of the beginning of the test and index of germination speed. In agreement with the results obtained in the present work, it can be concluded that the seeds with tegument presented larger germination percentage, and the retreat of the tegument affects the germination and vigor of the seeds negatively. The temperatures of 25 ºC and 30 ºC constants are favorable the germination and vigor of the seeds, while the temperatures of 20 ºC constant and 20-30 ºC alternate they commit the acting in the germination and vigor of the seeds of pinhão-manso.