寄主植物对烟粉虱后代种群抗性相关酶活性的影响

比较了取食不同寄主植物的烟粉虱后代羧酸酯酶和乙酰胆碱酯酶的活力。结果表明:寄主植物对烟粉虱羧酸酯酶和乙酰胆碱酯酶(AChE)活力影响显著,取食不同寄主植物的烟粉虱后代羧酸酯酶和AChE活力差异显著。在试验的甘蓝、花菜、小白菜和苘麻4种寄主中,取食小白菜、甘蓝的烟粉虱后代种群羧酸酯酶的酶活力显著高于取食花菜和苘麻的,取食小白菜的酶活力最高,是取食苘麻的3.90倍。取食甘蓝的后代种群AChE的酶活力最高,取食苘麻的后代种群酶活力最低;取食花菜与小白菜、小白菜与苘麻之间没有明显差异,但甘蓝与其他寄主上的烟粉虱后代种群之间的差异均达到了极显著水平。取食甘蓝、花菜、小白菜的后代AChE OD值分别为取食苘麻的2.85、2.39倍和1.07倍。

Effects of host plants on enzymes related to pesticide resistance of Bemisia tabaci

The activity of CarE and AChE in Bemisia tabaci progenies fed with different host plants were determined.The results showed that the activity of CarE and AChE in B.tabaci fed with different host plants was significantly different from each other,and the results also indicated that host plants significantly affected the CarE and AChE activity of B.tabaci progenies.Among the four host plants tested,the CarE activity of the populations of B.tabaci progenies fed on greengrocery and cabbage was significantly higher than that on cauliflower and abutilon.The CarE activity was the highest on greengrocery(3.90 times higher than on abutilon).The AChE activity of the populations of B.tabaci progenies fed on cabbage was the highest,while that on abutilon is the lowest.There were no difference in AChE activity of B.tabaci populations between on cauliflower and greengrocery or on greengrocery and abutilon.But the AChE activity in cabbage populations was significantly higher than in other populations of B.tabaci progenies.The OD values of AChE in B.tabaci progenies on cabbage,cauliflower and greengrocery were 2.85,2.39,1.07 times higher than on abutilon,respectively.