Biological Control and Spatial Ecology Laboratory (LUBIES), CP 160/12, Université Libre de Bruxelles, av. FD Roosevelt 50, B-1050 Brussels, Belgium.
Toxins (Basel). 2012 May;4(5):373-89. doi: 10.3390/toxins4050373. Epub 2012 May 24.
On the market since 1996, genetically modified plants expressing an insecticidal toxin (Cry toxin stemmed from Bacillus thuringiensis) target several lepidopteran and coleopteran pests. In this study, we assessed the impact of two varieties of Bt maize producing different toxins (Cry1Ab or Cry1Fa, respectively) on the biology of a storage pest: Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae). The Indianmeal moths were susceptible to both toxins but showed an escape behavior only from Cry1Fa. The weight of females issued from larvae reared on Cry1Ab increased with increasing toxin concentration, but adults of both sexes reared on Cry1Fa had decreased weight. Both toxins increased development time from egg to adult regardless of sex and had no impact on the male adult lifespan. Finally, we recorded a time lag between metamorphosis from the non-Bt and the Bt diets, which increased proportionally to Cry concentration in the Bt diet.
自 1996 年以来，市场上出现了表达杀虫毒素（源自苏云金芽孢杆菌的 Cry 毒素）的转基因植物，针对多种鳞翅目和鞘翅目害虫。在这项研究中，我们评估了两种产生不同毒素（Cry1Ab 或 Cry1Fa）的 Bt 玉米品种对一种仓储害虫——粉斑螟（Plodia interpunctella（Hübner））（鳞翅目：麦蛾科）生物学的影响。印度谷螟对这两种毒素都很敏感，但只对 Cry1Fa 表现出逃避行为。用 Cry1Ab 饲养的幼虫产生的雌性个体体重随着毒素浓度的增加而增加，但用 Cry1Fa 饲养的雌雄成虫体重都有所下降。两种毒素都会增加从卵到成虫的发育时间，而与性别无关，且对雄性成虫的寿命没有影响。最后，我们记录了从非 Bt 饲料到 Bt 饲料的变态时间滞后，该滞后时间与 Bt 饲料中的 Cry 浓度成正比增加。
