Alkaline phosphatase 2 is a functional receptor of Cry1Ac but not Cry2Ab in Helicoverpa zea
文献类型： 外文期刊
作者： Wei, J. 1 ; Zhang, M. 1 ; Liang, G. 3 ; Li, X. 1 ;
作者机构： 1.Univ Arizona, Dept Entomol, Tucson, AZ 85721 USA
2.Univ Arizona, BIO5 Inst, Tucson, AZ 85721 USA
3.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing, Peoples R China
4.Zhengzhou Univ, Sch Agr Sci, Zhengzhou, Henan, Peoples R China
关键词： Bt-transgenic crops; cell toxicity; cross-resistance; gain-of-function analysis; pyramid; RNAi
期刊名称：INSECT MOLECULAR BIOLOGY （ 影响因子：3.585； 五年影响因子：3.215 ）
ISSN： 0962-1075
年卷期： 2019 年 28 卷 3 期
页码：
收录情况： SCI
摘要： Although membrane-bound alkaline phosphatases (ALPs) have been proposed as a receptor for Cry1Ac in a few lepidopteran species, their potential functions as a Cry2Ab receptor are yet to be verified. To determine if ALP2 also serves as a receptor for Cry1Ac and even for Cry2Ab in Helicoverpa zea, we measured the potency of activated Cry1Ac and Cry2Ab against midgut and fat body cell lines of H. zea and the ovarian cell line of Spodoptera frugiperda (Sf9) expressing H. zea ALP2 (HzALP2) or transfected with HzALP2 double-stranded RNA (dsRNA). Relative to the control cells, the three cell lines expressing HzALP2 were more susceptible to Cry1Ac but there was no difference for Cry2Ab. By contrast, the two H. zea cell lines transfected with HzALP2 dsRNA were resistant to Cry1Ac while kept susceptible to Cry2Ab. Furthermore, RNA interference knockdown of HzALP2 in H. zea larvae enhanced larval survival on Cry1Ac-containing diets. These findings indicate that HzALP2 functions as a receptor of Cry1Ac but not Cry2Ab.
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