寄主植物对桃蚜羧酸酯酶和乙酰胆碱酯酶的诱导作用

在１９９５～１９９６年研究了寄主植物对桃蚜［Ｍｙｚｕｓｐｅｒｓｉｃａｅ（Ｓｕｌｚｅｒ）］羧酸酯酶（ＣａｒＥ）和乙酰胆碱酯酶（ＡＣｈＥ）的诱导作用。在试验的甘蓝、茄子和桃树３种寄主植物中，取食甘蓝的桃蚜种群ＣａｒＥ和ＡＣｈＥ活性最高，取食茄子和桃树的桃蚜种群ＣａｒＥ活性没有明显不同，而ＡＣｈＥ活性取食茄子的桃蚜种群明显高于取食桃树的种群。ＣａｒＥ与底物的亲和力是桃树＞茄子＞甘蓝，而ＡＣｈＥ与底物的亲和力则是甘蓝＞茄子＞桃树。ＡＣｈＥ与毒扁豆碱的双分子速率常数（Ｋｉ）值大小顺序为甘蓝＞桃树＞茄子

Induction of Host Plants on Carboxylesterase and Acetylcholinesterase Activity in Green Peach Aphid

The induction of host plants on carboxylesterase (CarE) and acetylcholinesterase (AChE) was investigated in green peach aphid (Myzus persicae) during 1995 to 1996 The CarE or AChE activity of M.persicae population feeding on coleslaw was the highest in the three host plants tested There was no difference of CarE activity between aubergine and peach populations of M.persicae, but the AChE activity was significantly higher in aubergine population than in peach population of M.persicae The order of induction to CarE affinity using α-naphthyl acetate (α-NA) as substrate was: peach>aubergine>coleslaw However the order of AChE affinity with substrate (acetylthiocholine, ATCh) was: coleslaw>aubergine>peach The bimolecular rate constant (Ki) value of AChE with eserine was: coleslaw>peach>aubergine population of M.persicae