Estimation of 137 Cs and 90 Sr ionizing radiation impact on the plant vegetative and generative organs

Topicality of the ionizing radiation impact on organisms is conditioned by Nuclear Power Plants (NPP), releasing of various technogenic radionuclides into the environment during the operational period in different in different way. Chronic exposure of low doses of ionizing radiation to biota is an invisible, however, inevitable factor of the environment (Lu et al., 2006; Geras’kin et al., 2007; 2008). Radionuclide accumulation in abiotic and biotic components of environment can cause toxic and genotoxic effects on organisms (Geras’kin et al., 2000, Minouflet et al., 2005). It is known that distribution of accumulated Cs and Sr differ between plant organs (Soudek et al., 2006). Localization of these radionuclides is mostly found in the areas of the cell expansion and active metabolism, i.e. in the plant’s parts with increased requirement of water and nutrient (Soudek et al., 2006). Radionuclides accumulated in plants can disturb plant physiological processes which can stop cell division and decrease vitality and reproduction of plant (Evseeva, Geras’kin, 2000).