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Partiti-like viruses from African armyworm increase larval and pupal mortality of a novel host: the Egyptian cotton leafworm

文献类型： 外文期刊

作者： Xu, Pengjun 1 ; Rice, Annabel 2 ; Li, Tong 3 ; Wang, Jie 1 ; Yang, Xianming 4 ; Yuan, He 4 ; Graham, Robert, I 5 ; Wilson, Kenneth 2 ;

作者机构： 1.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Peoples R China

2.Univ Lancaster, Lancaster Environm Ctr, Lancaster, England

3.Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou, Peoples R China

4.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing, Peoples R China

5.SRUC, Dept Rural Land Use, Aberdeen, Scotland

关键词： host shift; partiti-like viruses; Spodoptera littoralis; fitness; transcriptome

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.462； 五年影响因子：4.688 ）

ISSN： 1526-498X

年卷期： 2022 年 78 卷 4 期

页码：

收录情况： SCI

摘要： BACKGROUND The general principle of using microbes from one species to manage a different pest species has a clear precedent in the large-scale release of mosquitoes carrying a Wolbachia bacterium derived from Drosophila flies. New technologies will facilitate the discovery of microbes that can be used in a similar way. Previously, we found three novel partiti-like viruses in the African armyworm (Spodoptera exempta). To investigate further the utility and consistency of host shift of insect viruses as a potential pest management tool, we tested the interaction between the partiti-like viruses and another novel host, the Egyptian cotton leafworm (Spodoptera littoralis). RESULT We found that all three partiti-like viruses appeared to be harmful to the novel host S. littoralis, by causing increased larval and pupal mortality. No effect was observed on host fecundity, and partiti-like virus infection did not impact host susceptibility when challenged with another pathogen, the baculovirus SpliNPV. Transcriptome analysis of partiti-like virus-infected and noninfected S. littoralis indicated that the viruses could impact host gene-expression profiles of S. littoralis, but they impact different pathways to the two other Spodoptera species through effects on pathways related to immunity (Jak-STAT/Toll and Imd) and reproduction (insulin signaling/insect hormones). CONCLUSION Taken together with the previous findings in the novel host S. frugiperda, these results indicate a parasitic relationship between the partiti-like viruses and novel insect hosts, suggesting a possible use and novel pest management strategy through the artificial host shift of novel viruses.

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