Identification and functional characterization of chemosensory genes in olfactory and taste organs of Spodoptera litura (Lepidoptera: Noctuidae)  

作　　者：Jun Yang Bao-Tong Mo Guo-Cheng Li Ling-Qiao Huang Hao Guo Chen-Zhu Wang 

机构地区：[1]State Key Laboratory of Integrated Management of Pest Insects and Rodents,Institute of Zoology,Chinese Academy of Sciences,Beijing,China [2]CAS Center for Excellence in Biotic Interactions,University of Chinese Academy of Sciences,Beijing,China [3]College of Plant Protection,Shanxi Agricultural University,Taiyuan,Shanxi,China

出　　处：《Insect Science》2024年第6期1721-1742,共22页昆虫科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.32130090 and 32372541);the State Key Laboratory of Integrated Management of Pest Insects and Rodents(Grant No.IPM2212).

摘　　要：The tobacco cutworm Spodoptera litura is one of the most destructive polyphagous crop pests.Olfaction and taste play a crucial role in its host plant selection and sexual communication,but the expression profile of chemosensory genes remains unclear.In this study,we identified 185 chemosensory genes from 7 organs in S.litura by transcriptome sequencing,of which 72 genes were published for the first time,including 27 odorant receptors(ORs),26 gustatory receptors(GRs),1 ionotropic receptor(IR),16 odorant-binding proteins(OBPs),and 2 chemosensory proteins(CSPs).Phylogenetic analyses revealed that ORs,IRs,OBPs,and sensory neuron membrane proteins(SNMPs)were mainly expressed in antennae and sequence-conserved among Noctuidae species.The most differentially expressed genes(DEGs)between sexes were ORs and OBPs,and no DEGs were found in GRs.GR transcripts were enriched in proboscis,and the expression of sugar receptors was the highest.Carbon dioxide receptors,sugar receptor-SliuGR6,and bitter GRs-SlituGR43 and SlituGR66 had higher sequence identities between Noctuidae species.CSPs were broadly expressed in various organs,and SlituCSP13 was a DEG in adult antennae.The functional analysis in the Drosophila OR67d expression system found that SlituOR50,a receptor highly expressed in female antennae,is selectively tuned to farnesyl acetate.The results provide a solid foundation for understanding the molecular mechanisms by which chemosensory genes operate to elicit behavioral responses in polyphagous insects.

关 键 词：CHEMORECEPTOR Drosophila expression system GUSTATION OLFACTION Spodopteralitura transcriptome 

分 类 号：Q96[生物学—昆虫学]