The Mobility of 65zn In Trifolium Subterraneu M L. and Antirrhinum Majus L.

Abstract

T. subterraneum (cv. Clare) and A. majus were grown in nutrient cultures to which 65Zn was added at two stages in the plants' development. It was found that the 65Zn recently absorbed by the roots was preferentially routed to the youngest leaves. When the plants were transferred from radioactive to non·radioactive cultures, only a limited recirculation of 65Zn took place. In T. 8ubterraneum this was principally from the roots and hypocotyl, but also between and within some leaves, whilst in A. majus recirculation occurred along the stem, roots, and within some leaves.