The main component of the aphid alarm pheromone (E)-β-farnesene affects the growth and development of Spodoptera exigua by mediating juvenile hormone-related genes

• DOI: 10.3389/fpls.2022.863626
• Publication Date: 2022-08-23T08:01:35Z
• Authors: Yang Sun; Yan Li; Wen Zhang; Bin Jiang; Si-Min Tao; Han-Yang Dai; Xin-Tong Xu; Yue-Xin Sun; Lei Yang; Yong-Jun Zhang
• Keywords: Exigua; Beet armyworm

The (E)-β-farnesene (EβF) is one of the most important secondary metabolites in some plants and provides indirect defense against aphids. However, direct effect EβF pests still unclear. In this study, various concentrations (0.16, 0.8, 4 g/kg) were provided an artificial diet to determine effects on Spodoptera exigua. results showed that containing g/kg reduced final survival S. exigua larvae per female fecundity adults significantly when compared with CK SC controls (p < 0.05), then ultimately it also affected intrinsic rate increase 0.05). Furthermore, bioassay indicated proliferation population was inhibited by ingestion a dose-dependent manner. Combined differential RNA-seq data RT-qPCR analysis, found four key genes involved juvenile hormone degradation upregulated treated at dose 0.8 two This could disturb normal function hormones reduce larvae. Additionally, regulate females, including SeVg SeVgR, downregulated adult females 0.05) they larval stage, relative expression these after treatment controls. These findings suggested first disturbed upregulating genes, SeVg/SeVgR proteins, thus reducing size increasing mortality inhibiting fecundity.