Studies of the radiation-induced effects of low-let and high-let radiations in the populations of Wolffia arrhiza. Effect of #gamma#-irradiation on viability and morphosis level in the populations of Wolffia arrhiza

摘要

Dose-effect curves for radiobiological effects on individual, actively methabolizing test organisms, plants of Wolffia arrhiza (Lenmacea) have been studied, using three tests - ability to form specific radiation-induced morphosis, plants lethality and growth curves. Dose-effect curves in the dose-range from 0,5-10,0 Gy under dose rate 0,2 Gy/min shows well-prononced arise of radiomorphosis level in the control samples was 0,5 per cent. Using plants lethality and population growth as criteria for radiation-induced alterations we observed polymodal type of the dose-effect curves for the population growth. During 14 weeks growth curves were mainly very close in the control and irradiated samples. But we observed growth stimulation on the 4th-8th weeks after irradiation (20-30 per cent above control level) in the samples irradiated in the doses 0,5 and 5,0 Gy. Plants lethality in the early period after #gamma#-irradiation enhanced in the samples irradiated with the doses 5, 7,5 and 10 Gy.