Copper Toxicity in Phaseolus vulgaris L. as Influenced by Iron Nutrition. III. Partial Alleviation by Succinic Acid 2,2-dimethyl hydrazide1

Abstract

Abstract Severe chlorosis of leaves and cellular disruption and distortion in the roots usually associated with Cu toxicity were absent from plants grown in solution culture with high Cu (0.50 ppm) to which succinic acid 2,2-dimethyl hydrazide (SADH) was added. The presence of either SADH or EDTA in the nutrient solutions increased the Fe concentration in the roots and shoots; a synergistic effect appeared when the compounds were combined. Plants grown with EDTA had lower Cu levels in the shoots and roots than those grown without EDTA. Although SADH alone had no effect on Cu concentrations, SADH and EDTA together, caused low concentrations in the roots regardless of the Cu level in the nutrient solution.