Electrical conductivity test for the determination of the physiological seed quality of Croton floribundus¬ spreng-Euphorbiaceae

This experiment studied the efficiency of the electrical conductivity test to evaluate the vigor of Croton floribundus seeds. Seven seed lots were evaluated with seedlings emergency and electrical conductivity tests. In the electrical conductivity test, measurements were taken with 25 and 50 seeds samples after 02, 04, 06, 12, 24, 48, 72 and 96 hours of soaking in 75 ml of deionized water at 25 °C. With four replications subjected to analysis of variance in a completely randomized design in split plot wherethe two quantities of seeds represented the plots and the eight periods of soaking represented the subplots. Data from number of seeds were compared by Tukey test at 5% and for the periods of soaking by polynomial regression. The results indicated that the electrical conductivity test is efficient to separate the lots of capixingui seed and the most effective time period was 96 hours soaking at 75 ml with 25 or 50 seeds at 25 ° C corroborating the results the germination test although they could be already separated with 48 h soaking for 25 seeds samples and 24 hours soaking for 50 seeds samples.