[Undulating kinetics factors in radiation mutagenesis]

Air-dry Crepis capillaris seeds, soaked for 14 and 20 hours, were dried to the moisture content of 1,1% with the following gamma-irradiation at a dose of 1500 r. Irradiated seeds were stored in the state of identical moisture for 38 days. The drying of three groups of seeds to moisture content of 1,1% provided their identical initial radiosensitivity. In the course of the storage mutability of treated seeds significantly increased as compared with the yield of mutations in non-stored seeds, and revealed undulating kinetics that involved all types of arising chromosome and chromatid rearrangements. The character of undulating kinetics is due to a correlation between functional state of nucleus (early G1, late G1, S) and water content in seeds.