Study on difference in morpholofical and physiological characters of wheat varieties to potassium

The differences in morphological and physiological characters of six wheat varieties to potassium were studied using solution culture The K uptake efficient one such as 92117 and Taihe 5025 had the advantage in root length, root radius(Tab.1), uptake areas(Tab.2) , Km and Imax(Tab.3) The inefficient ones such as Jinghe 1 with low Cmin could be tolerant to low K stress There wasn't apparent relation of H+ excretion and K+ uptaked by roots (Fig.1) The morphological and physiological characters of roots could be only reference to screen K efficient uptake of wheat and kinetics parameters should be index for getting wheat with high K efficiency and tolerance to low K stress So it was better to combine the morphological characters of roots with kinetics parameters as an index