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Cry1Ac和Cry2Ab蛋白对大草蛉生长发育及酶活力的影响

, PP. 285-291

Keywords: 大草蛉,Cry1Ac/Cry2Ab蛋白,安全性评价,生物学,酶活性

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Abstract:

为明确转Cry1Ac和Cry2Ab基因棉花对大草蛉的影响,运用Bt蛋白与人工饲料混合的方法,以大于转基因棉花叶片中蛋白含量20倍的剂量饲喂大草蛉初孵幼虫,初步研究了Cry1Ac和Cry2Ab对大草蛉生物学参数和消化酶、解毒酶活性的影响。结果表明:取食含Bt蛋白饲料的大草蛉幼虫的发育历期、体重、蛹重、成虫体重、羽化率等生物学参数与对照相比均没有显著差异;在大草蛉幼虫体内可以检测到含量较高的Cry1Ac和Cry2Ab蛋白,分别为974.92~1282.39ng/g鲜重和5592.62~6082.92ng/g鲜重,而在大草蛉成虫体内检测到的Cry1Ac和Cry2Ab蛋白含量非常低,分别为0.29~0.39ng/g鲜重和50.34~56.71ng/g鲜重;取食含Bt蛋白的饲料对大草蛉幼虫的类胰蛋白酶、类胰凝乳蛋白酶、氨肽酶和谷胱甘肽-S-转移酶活性有一定的影响,但对大草蛉成虫影响与对照差异不显著。表明大草蛉取食含Bt蛋白的人工饲料后,虽然体内可以检测到一定含量的Bt蛋白,但对大草蛉的生长发育并没有显著的直接不利影响。

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