Аннотация:Modern literature and original data on the 137Cs root uptake by plants and the process of the radionuclide
accumulation in above- and belowground fractions of plant biomass are summarized and analyzed. According
to various investigators, the distribution of specific activities and transfer factors values of 137Cs in plant biomass is uneven: the ratio of 137Cs in shoots and roots calculated for 54 plant species varies from 0.01 to 9.36. The hypotheses of several authors on this phenomenon are discussed and personal possible explanation is proposed.