[Genetic effects of the decay of radionuclide products of nuclear fission in Saccharomyces cerevisiae cells. Lethal effects of the decay of 89Sr incorporated in cells of different ploidies and radiosensitivity].

Decay of 89Sr incorporated in yeast cells produces a pronounced inactivating effect. The transmutation mainly contributes (about 80%) to cell inactivation. Haploid cells are more sensitive to 89Sr disintegration than diploid and tetraploid ones. A radiosensitive mutant XRS2, that is particularly sensitive to the transmutation effect of radionuclides, has proved to be sensitive to 89Sr transmutation as well. At the same time, another radiosensitive mutant, rad 54, does not virtually differ from the wild-type strain by its sensitivity to 89Sr decay.