The fate of ~137Cs in senescing roots of Eriophorum vaginatum L.

摘要

The fate of ~137Cs in senescing roots was investigated by deliberately increasing the proportion of dead roots in half of the root system of previously ~137Cs-labelled Eriophorum vaginatum L. (Hare's-tail cotton-grass) plants by using peg (polyethylene glycol) to induce a severe water deficit in a split-root hydroponic system. The rooting solutions and treated and untreated plants were analysed over a 21-day period subsequent to radiolabelling. The loss of ~137 Cs from senescing roots was recovered and translocated to the shoot or to the remaining live roots.