Abstract:

Several resistance related factors including isozyme of Peroxidase (POD), Superoxide dismutase (SOD), and Esterase (EST), β-1,3-glucanase and chitinase activities in leaf of tomatoes at different development stages were analyzed. The results demonstrated that the isozymes of POD, SOD and EST in the same age leaves were enhanced with plant growth. Effects of leaf age on these isozymes were much lower than plant developmental stage. The activities of β-1,3-glucanase were enhanced significantly in anthesis plant, while chitinase were the highest of all in six-leaf plant. β-1,3-glucanase activities were enhanced with leaf age increasing. However, chitinase activities were not significantly different in three age leaf.