化学感受蛋白直系同源基因CSP8在茶尺蠖及近缘种灰茶尺蠖中的表达分析

化学感受蛋白(Chemosensory proteins,CSPs)在昆虫化学通讯及其他生理过程中发挥重要功能.茶尺蠖与其近缘种灰茶尺蠖是茶园重要鳞翅目害虫,对我国茶叶的安全生产造成严重危害.研究化学感受蛋白直系同源基因在茶尺蠖两近缘种间的表达,有助于研发同时针对该两种害虫的绿色防控技术.通过荧光定量qRT-PCR分析...

The Expression Profiles of Chemosensory Protein 8 Orthologs in Two Closely Related Tea Geometrid Species,Ectropis obliqua Prout and Ectropis grisescens Warren

Chemosensory proteins (CSPs) play crucial roles in insect chemosensory and non-chemosensory processes. Ectropis obliqua Prout and its sibling species, Ectropis grisescens Warren are serious lepidopteran moth pests in tea gardens and they cause destructive damages to tea plants. The development of greener and environmentally friendly pest managements would benefit from orthologous CSPs’ investigation on the interaction between two Ectropis species and tea plants. This study mainly examined the expression profiles of EgriCSP8, the orthologs of EoblCSP8 in E. grisescens by using the real-time quantitative PCR experiment. The qRT-PCR results show that EgriCSP8 and EoblCSP8 had a conserved larvae-enriched expression pattern. EgriCSP8 was mainly expressed in the heads of the third instar of E. grisescens larvae. Next, the expression levels of CSP8 were compared between E. obliqua and E. grisescens. The results show that the expression level of EoblCSP8 in E. obliqua was higher than that of EgriCSP8 in E. grisescens. In addition, the effects of Wolbachia and tea plant volatiles on CSP8 expression levels in E. obliqua and E. grisescens were also estimated. The results show that the EgriCSP8 expression level declined significantly when Wolbachia was removed in E. grisescens, which provided the first evidence that the insect CSPs’ expression is associated with Wolbachia. These findings laid a foundation for the future studies on the molecular mechanisms of chemosensory and coevolution between the geometrid sibling species and tea plants.