取食不同杨树对光肩星天牛幼虫体内羧酸酯酶活性的影响

Effects of Different Poplars on the Activity of the Carboxylesterase in the Larvae of Anoplophora glabripennis

取食不同杨树的光肩星天牛幼虫,其羧酸酯酶(CarE)的活力具有明显差异,其变化趋势基本与6种杨树的抗虫性程度呈负相关。动力学研究表明:羧酸酯酶的活力随杨树的抗虫性而异,高抗的毛白杨随着取食时间增长,羧酸酯酶活力逐渐下降。取食后的前10d,羧酸酯酶活力的变化主要由酶分子变构引起;10d以后,则是由酶分子数量变化引起,感虫的加杨,随着取食时间的增长,羧酸酯酶的活力逐渐上升,其变化主要是由于羧酸酯酶的数量差异造成的。

It was different significantly that.the activity of the carboxylesterase of the Anoplophora glabripennis feeding different poplars, with the same negative correlation trend as the resistant sequence of the six poplars species. The activity of the carboxylesterase in Populus to mentosa, a resistant poplar, decreased gradually as the time of eating increased. But kinetics studies showed that this change is mainly because of the change of CarE molecular before the ten-days of eating. Quantitative differences might gradually replace the role within the later days. To P. canadensis, a sensitive poplar, the activity of the carboxylesterase increased gradually with the increase of eating time, and the quantitative differences play a key role in the change.