麦红吸浆虫滞育发生和解除过程中保护酶活力动态

采用保护酶活性测试盒分别测定了麦红吸浆虫滞育前、滞育期及滞育解除后过氧化物酶（POD）、超氧化物歧化酶（SOD）和过氧化氢酶（CAT）等3种保护酶的活力.结果表明：幼虫从老熟到进入滞育的初期，3种保护酶的活力均呈下降趋势.滞育年周期中，SOD和CAT活力对环境温度的反应相同，即低温促进其活力升高，高温导致其活力下降；POD活力与环境温度和滞育发育有关；整个滞育期间，裸露幼虫和结茧幼虫3种保护酶的活力随季节变化趋势相同，但同期的裸露幼虫活力略高于结茧幼虫；不同滞育年限幼虫3种保护酶的活力差异不显著.滞育解除后，3种保护酶的活力均随生长发育进程逐渐升高.

Change patterns of protective enzyme activities in pre-diapause, diapause, and post-diapause larvae of Sitodiplosis mosellana Gehin

The activities of protective enzymes peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) in pre diapause, diapause, and post diapause larvae of Sitodiplosis mosellana Gehin were determined by using protective enzyme testing kits. The results indicated that the activities of the three protective enzymes showed a decreasing trend from pre diapause to early diapause larvae. In one-year cycle, the SOD and CAT activities of diapause larvae had the same responses to environmental temperature, i.e., increased at lower temperature but decreased at higher temperature, while POD activity was related to both environmental temperature and the development situation of the larvae. A similar seasonal variation trend was observed in the three protective enzymes of both no-cocooned and cocooned larvae in one-year cycle. The three protective enzyme activities of no-cocooned larvae were higher than those of cocooned larvae at the same diapause stage. No significant difference of the three protective enzyme activities was found between 1st and 2nd year diapause larvae. The activities of the three protective enzymes increased gradually with the development of post-diapause larvae.