Kinetic analysis of cadmium uptake in oilseed rape plants using positron multi-probe system

多点型ポジトロン検出器を用いた植物のカドミウム吸収特性の解析

鈴井 伸郎; 中村 進一*; 伊藤 小百合; 河地 有木; 石岡 典子; 藤巻 秀

Suzui, Nobuo; Nakamura, Shinichi*; Ito, Sayuri; Kawachi, Naoki; Ishioka, Noriko; Fujimaki, Shu

We have developed a monitoring system of Cd radioactivity in tracer solution using Positron Multi-Probe System (PMPS) that enables the noninvasive measurement of the amounts of Cd uptake by an intact plant. Two-week old oilseed rape plant ( L.) was placed into a plastic cylindrical container containing 30 ml of 0.5 mM CaCl solution with approximately 10 MBq of Cd. The cylindrical container was divided by nylon mesh into two compartments, the root of the plant was immersed in the upper compartment, and a pair of PMPS detectors was placed outside the bottom compartment. As a result, we successfully obtained the continuous data of the amount of a radioactive tracer taken up by the intact plant for 36 hours.