[The chronic action of gamma radiation on a growing population of Saccharomyces cerevisiae yeasts at different dose rates].

Experimental data on the processes of division and death of haploid and diploid yeast Saccharomyces cerevisiae of wild type and of their radiosensitive mutants exposed under optimal for reproduction conditions to chronic action of gamma-radiation at various dose rates are presented. It is shown that the dependence of the integral division/death process on time was exponential for all the studied strains. With dose rate increasing, the duration of the lag period and the probability of cell inactivation increased, while the multiplication rate decreased. These processes, for equal dose rates, were more expressed for the radiosensitive mutants.