不同棉花品种对棉蚜羧酸酯酶活性影响的研究

对取食不同棉花品种后棉蚜羧酸酯酶比活力测定结果表明：不同棉花品种对棉蚜羧酸酯酶活性影响较大，并且能影响棉蚜羧酸酯酶对底物的活性。棉蚜取食高抗品种后，总的羧酸酯酶活力提高，并且酶活力与单宁的含量呈不显著的正相关（ｒ＝０．７８７）。这种相关性表明棉花中的单宁的含量可能是影响棉蚜外源解毒酶活性提高的一个因素，同时棉蚜羧酯酯酶的活性也是衡量棉花抗性的一个指标。

Study of Carboxylesterase Activity of Cotton Aphid Fed on Differ-ent Cotton Varieties

Study on the carboxylesterase activity in cotton aphid fed on different varietiesshowed that the esterase activity in aphids fed on resistant varieties was higher than thaton susceptible varieties.The estrasesterase positively correlated with the content of taninin cotton plant(r=0. 787).This correlation showed that the detoxification enzyme activi-ty of cotton aphid,and the esterase activity is also standard for evaluating the aphid resis-tance of Cotton.