UV-B and UV-C radiation on the germination of soybean seeds

UV radiation use is currently receiving attention due to concerns about its potential positive or negative effects on the physiological responses of plants, so goal this study was evaluate influence natural and artificial ultraviolet (UV-B UV-C) soybean seed germination. Initially, seeds were exposed for different periods time (0, 1, 2, 4, 8 hours), with a intensity 2.5 W m-2. They sown germitest paper stored in Biochemical Oxygen Demand chamber set at 25 °C 12-hour photoperiod. Tests conducted germination (at days), first count 5 length, dry mass seedlings. The results indicated that exposure UV-B UV-C (from 1 hour - 9000 J m-2) light reduced percentage, seedling decrease root length observed after 2 (UV-C) 4 hours (UV-B) exposure. It concluded that, under conditions study, exposing influenced percentage initial growth.