Effect of 4‐amino‐6‐methyl‐3‐phenylamino‐1,2,4‐triazin‐5(4H)‐one on the integrity of chloroplasts from barley leaves

摘要

Abstract4‐Amino‐6‐methyl‐3‐phenylamino‐1,2,4‐triazin‐5(4H)‐one alters the integrity of chloroplasts in barley (Hordeum vulgare L. var. Hassan) leaves as judged by their sedimentation profiles in linear gradients of sucrose. This effect may be related to the inhibition caused by 4‐amino‐6‐methyl‐3‐phenylamino‐1,2,4‐triazine‐5(4H)‐one of both ascorbate peroxidase and superoxide dismutase activities, and could thus be explained by an accumulation of toxic reduced‐oxyge