[The characteristics of the realization of cytogenetic damage in mammalian and plant cells exposed to low doses of radiation].

A complicated character of the cytogenetic injury dependence upon radiation dose was revealed after low-level gamma irradiation of Vicia faba seedlings and Chinese hamster fibroblasts. The dependence was linear with low-level secondary exposure to 70 GeV protons. The authors discuss a threshold nature of induction of the cytogenetic damage repair responsible for a high outcome of damages under the effect of low-level gamma radiation.