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Rapid spread of a densovirus in a major crop pest following wide-scale adoption of Bt-cotton in China

文献类型： 外文期刊

作者： Xiao, Yutao 1 ; Li, Wenjing 1 ; Yang, Xianming 1 ; Xu, Pengjun 4 ; Jin, Minghui 2 ; Yuan, He 2 ; Zheng, Weigang 2 ; Sober 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing, Peoples R China

2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Guangdong Lab Lingnan Modern Agr, Genome Anal Lab,Minist Agr & Rural Affairs,Shenzh, Shenzhen, Peoples R China

3.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertil, Wuhan, Peoples R China

4.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao, Peoples R China

5.Univ Lancaster, Lancaster Environm Ctr, Lancaster, England

6.Univ Nacl Autonoma Mexico, Inst Biotecnol, Mexico City, DF, Mexico

期刊名称：ELIFE （ 影响因子：8.146； 五年影响因子：9.059 ）

ISSN： 2050-084X

年卷期： 2021 年 10 卷

页码：

收录情况： SCI

摘要： Bacillus thuringiensis (Bt) crops have been widely planted and the effects of Bt-crops on populations of the target and non-target insect pests have been well studied. However, the effects of Bt-crops exposure on microorganisms that interact with crop pests have not previously been quantified. Here, we use laboratory and field data to show that infection of Helicoverpa armigera with a densovirus (HaDV2) is associated with its enhanced growth and tolerance to Bt-cotton. Moreover, field monitoring showed a much higher incidence of cotton bollworm infection with HaDV2 in regions cultivated with Bt-cotton than in regions without it, with the rate of densovirus infection increasing with increasing use of Bt-cotton. RNA-seq suggested tolerance to both baculovirus and Cry1Ac were enhanced via the immune-related pathways. These findings suggest that exposure to Bt-crops has selected for beneficial interactions between the target pest and a mutualistic microorganism that enhances its performance on Bt-crops under field conditions.

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