A Topographic Method for Studying Uptake, Translocation and Distribution of Inorganic Ions using Two Radiotracers Simultaneously

A novel topographic method is described for the fully automatedquantitative resolution of activity of two simultaneously appliedbeta tracers in plant tissues. The advantages of this methodusing specially developed silicon detectors are demonstratedin studying the effect of direct current on the uptake and distributionof Ca²⁺ and P₁ ions in leaves and stems of Chenopodium rubrum.This treatment has recently been shown to inhibit flower inductionin this plant. Key words: Radiotracer multi-labelling, computer-controlled resolution, quantitative topographic evaluation