Baeva E. Induction and display of radioadaptive response of cells in inbred and heterosis Helianthus annuus L. plants

Research object: induced radioadaptive response (RAR) in plants. Purpose: to clear up the possibility of RAR induction, indexes, degree of manifestation and preservation time in inbred and hybrid plants in cellular level in seeds pretreated by adaptive irradiation of gamma-radiation and mm-waves. Research methods: cytological analysis, anaphase method of registration of aberrations, statistical analysis. Theoretical and practical results, novelty: First RAR induction in inbred and heterotic Helianthus annuus L. plants in early postradiation period was demonstrated. RAR indexes in ontogenesis of inbred and heterotic plants were investigated and it was shown that RAR, induced on early developmental stages, maintenances. The possibility of RAR maintenance during keeping irradiated seeds with different genotype was shown and changes in RAR indexes were find. A role of increased activity of cell division as a necessary condition for the formation of the radioadaptive response was confirmed. It was investigated the dependence of RAR intensity on plant genotype and the different mechanisms in proliferate activity increase in inbred lines and heterotic hybrid were found. Field of application: genetics.