ASSESSMENT OF THE EFFECT OF Sr-90 ON THE CONDUCTIVE TISSUES OF THE COMMON BEAN (PHASEOLUS VULGARIS)

The article presents the results of a study on the effect of Sr-90 on the conductive tissues of the common bean ( Phaseolus vulgaris ) in three consecutive generations grown in a model experiment. The absorbed dose rate from internal and external radiation for each common bean generation during the growing season averaged 9.5·10 −1 G and 1.7·10 −4 G, respectively. The thickness of the conductive tissues in 3 consecutive generations of beans varied in descending order: 1 st generation > 2 nd generation > 3 rd generation ≥ control group ( p <0.05). Collectively, the established increase in the thickness of the conductive tissues of the stem and leaf in the 3rd generation of beans is a response to stress and is aimed at maintaining homeostasis at the tissue level of the biological organization. The obtained patterns characterize the mechanisms of plant adaptation to a high level of soil contamination with Sr-90 radionuclide.