棉铃虫幼虫加单氧酶活性的组织分布

棉铃虫（Ｈｅｌｉｃｏｖｅｒｐａ ａｒｍｉｇｅｒａ）６龄幼虫不同组织的加单氧酶活性的测定结果显示，对－硝基苯甲醚Ｏ－脱甲基酶主要分由于外来物质的入口部位，以中肠和脂肪体的活性较高，在前肠、后肠和马氏管等组织中有相对较低的活性，而在体壁和精巢中未检测到Ｏ－ 甲基作用。体壁表现一定的艾氏剂环氧化作用，但其活性不及中肠的１０％，内源性制剂被证明并非体壁低加单氧酶活性的主要原因。不同组织生物量的差异及其动态

The tissue distribution of monooxygenase activities of cotton bollworm, Helicoverpa armigera

The demethylation of p nitroanisole in various tissues of cotton bollworm, Helicoverpa armigera , was examined. The highest activity of demethylase was found in midgut and fat body. Relatively low activities were expressed in foregut, Malpigian tubules and hind gut. No detectable demethylation existed in testis and integument tissues. Low aldrin epoxylation was detected in integument relative to midgut, and the potential endogenous inhibitor was proved not to be the cause for low p nitroanisole demethylase and aldrin epoxylase activities in integument. The difference and dynamics of tissue biomass were the factors which resulted in the changes in total monooxygenase activities of specific tissue. The midgut and fatbody might play an important role in the xenobiotics metabolism.