Species‐specific duplicated FMRFaR‐like gene A62 regulates spontaneous locomotion in Apolygus lucorum

Author:

Gao Han1,Tian Ying1,Zhang Hui1,Li Yanxiao1,Li Chenjun1ORCID,Li Bin1ORCID

Affiliation:

1. Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences Nanjing Normal University Nanjing China

Abstract

AbstractBACKGROUNDApolygus lucorum, a major cotton pest, has undergone a significant expansion of the FMRFaR gene within the GPCR superfamily, resulting in two classes of GPCR, namely FMRFaR (A54‐55) and newly duplicated FMRFaR‐like (A56‐62). Notably, FMRFaR‐like genes, particularly A62, show enhanced expression in the legs and wings of adults, indicating their potential role in locomotion. Employing A62 as a representative of FMRFaR‐like, our study investigates the influence of FMRFa, FMRFaR, and FMRFaR‐like on locomotion and development of A. lucorum.RESULTSFMRFaR and FMRFa exhibit comparable temporal and tissue expression patterns, whereas the FMRFaR‐like genes within A. lucorum exhibit completely distinct evolutionary and expression patterns compared to classical FMRFaR. RNA interference (RNAi) experiments revealed that suppressing FMRFa expression results in complete lethality in A. lucorum, but neither FMRFaR nor A62 exhibit the same effect after RNAi. Suppressing the expression of FMRFa only decreases the expression of the A54 gene simultaneously, suggesting that A54 may function as a classical FMRFaR activated by FMRFa. RNAi of A62 leads to wing malformation and a significant reduction in spontaneous movement behavior in A. lucorum. Further transcriptomic analysis revealed that A62 affects the A. lucorum's movement behavior through energy metabolism pathways and motor protein pathways.CONCLUSIONOur study unveils the unique and complex roles of FMRFa and its receptor in A. lucorum. These findings provide valuable insights into potential targets for pest control strategies aimed at managing A. lucorum populations in cotton fields. © 2024 Society of Chemical Industry.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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