摘要
转Bt基因作物可在植株体内表达来源于苏云金杆菌(Bacillus thuringiensis,Bt)的杀虫蛋白,在害虫控制中起着重要作用,但害虫也随之对Bt作物不可避免地产生抗性,逐渐威胁着Bt作物的可持续利用。了解Bt毒素的作用机理及害虫对Bt毒素的抗性机制将有助于制定行之有效的抗性治理策略,如高剂量/庇护区策略、多毒素策略、使用新的杀虫毒素和抗性监测等。这些策略或措施将有利于延缓害虫抗性,延长Bt作物的使用寿命,促进Bt作物的可持续利用。
Transgenic Bt crops producing insecticidal crystalline proteins from Bacillus thuringiensis, so-called Cry toxins, have been proved useful in controlling insect pests. However, evolution of insect resistance threatens the continued success of the transgenic crops. Understanding how insects become resistant will provide the basis for insect resistance management. Here we review possible pest resistance mechanisms against transgenic Bt crops and different strategies to cope with resistance, such as high dose-refugee strategy, pyramiding or Cry gene stacking which express several toxins with different modes of action in the same plant, Bt plants with novel Cry toxins, and so on. These approaches should be proposed to deal with resistance in the field to assure successful use of Bt crops for an extended period of time.
出处
《热带生物学报》
2015年第4期497-503,共7页
Journal of Tropical Biology
基金
公益性行业(农业)科研专项经费项目(201403075
201303057)
关键词
转Bt作物
害虫抗性
治理策略
Transgenic Bt crops
resistance mechanism
management strategy
