INFLUÊNCIA DA TEMPERATURA NA GERMINAÇÃO DE SEMENTES DE Ocimum canum SIMS

Abstract

The aim of this work was to examine the effect of different temperatures on germination of the seeds in O. canum. The seeds had been washed in under water and after immersed for 30s in water with environmenttemperature, 25, 30 (control), 50, 75 and 100ºC. After that it was immersed per 5 minutes in fungicidal solution and later washed by 10s with water and placed to germinate in plates of Petri conditioned in germination chamber regulated to provide temperature of 25 ± 1,0ºC and photoperiod of 12 hours. The completely randon design was used in experiment, with 5 treatments and 10 repetitions, resulting in 50 parcels. Each experimental unit wasconstituted of a plate of Petri contends 10 seeds. The averages had been compared by the Scott-Knott test at 5% level of probability. The germination rate was statistically equal in the control and the temperatures of 25, 50 and 75ºC, being superior to that one gotten to 100ºC. The temperature of 30ºC was the one that provided the biggest rate of germination, while that of 100ºC is not indicated for the breaking in dormancy of thisspecies, since it promoted the death of the embryo.