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Identification and Functional Characterization of an Odorant Receptor Expressed in the Genitalia of Helicoverpa armigera

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  • Weihao Liu

    (School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
    State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Dongdong Sun

    (State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Xiaoqing Wang

    (State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Zhiqiang Wang

    (State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

  • Yang Liu

    (State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China)

Abstract

Olfaction is critical for guiding the physiological activities of insects, with antennae being the primary olfactory organs. However, recent evidence suggests that other tissues may also participate in olfactory recognition. Among these, the genitalia of moths have received attention due to their roles in mating and oviposition. Sensilla and odorant receptors (ORs) in moth genitalia highlight the potential olfactory function of these structures. In this study, we examined the olfactory sensing capacity of the genitalia in Helicoverpa armigera by analyzing their structure in males and females and characterizing the expressed ORs. Scanning electron microscopy uncovered many sensilla distributed throughout the male and female genitalia. Transcriptome sequencing identified 20 ORs in the genitalia, with HarmOR68 exhibiting significant responses to methyl esters: methyl benzoate and salicylate. Our findings provide theoretical evidence that H. armigera genitalia may have significant olfactory perception functions.

Suggested Citation

  • Weihao Liu & Dongdong Sun & Xiaoqing Wang & Zhiqiang Wang & Yang Liu, 2024. "Identification and Functional Characterization of an Odorant Receptor Expressed in the Genitalia of Helicoverpa armigera," Agriculture, MDPI, vol. 14(7), pages 1-16, June.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:7:p:1030-:d:1424651
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