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The Aversive Response of the Locust Locusta migratoria to 3-Octanone, an Odorant from Fungal Pathogens, Is Mediated by a Chemosensory Protein

Author

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  • Xiao Xu

    (College of Animal Science and Technology, West Campus, China Agricultural University, Beijing 100094, China)

  • Long Zhang

    (College of Animal Science and Technology, West Campus, China Agricultural University, Beijing 100094, China
    Shandong Provincial Engineering Technology Research Center on Biocontrol for Pests, Jinan 250100, China)

  • Xingbo Zhao

    (College of Animal Science and Technology, West Campus, China Agricultural University, Beijing 100094, China)

Abstract

(1) Locusts are important agricultural pests. Identifying harmful substances and avoiding them is important for locusts’ survival; their abilities to do so remain to be clarified. (2) We examined the electrophysiological (electroantennogram (EAG) and single sensillum recording (SSR)) and behavioral responses (preference behavior in a T-maze) of locusts to 18 different compounds; (3) Of these 18 compounds, 9 elicited strong EAG responses, and 3 elicited SSR responses of neurons expressing locust odorant receptor 3 ( Lmig OR3). The 11 chemicals that elicited stronger EAG or SSR responses were selected for evaluation of the behavioral responses of locusts. Only 2-heptanone induced significant attraction responses in locusts at the tested concentration. RNA interference (RNAi) of Lmig OR3 and SSR experiments revealed that Lmig OR3 could detect 2-heptanone and 3-octanone. However, in behavioral experiments, RNAi of Lmig OR3 did not alter 2-heptanone-induced attraction but increased attraction by 3-octanone. (4) Our results suggest that the broadly tuned receptor expressed in a heterologous expression system exhibits a narrow electrophysiological response spectrum, and the aversive response of locusts to 3-octanone, an odorant from fungal pathogens, natural enemies, and non-host plants, is mediated by Lmig OR3. These findings enhance our understanding of the complex olfactory recognition mechanism in insects.

Suggested Citation

  • Xiao Xu & Long Zhang & Xingbo Zhao, 2023. "The Aversive Response of the Locust Locusta migratoria to 3-Octanone, an Odorant from Fungal Pathogens, Is Mediated by a Chemosensory Protein," Agriculture, MDPI, vol. 13(8), pages 1-13, August.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:8:p:1542-:d:1208974
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    References listed on IDEAS

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    1. Allison F. Carey & Guirong Wang & Chih-Ying Su & Laurence J. Zwiebel & John R. Carlson, 2010. "Odorant reception in the malaria mosquito Anopheles gambiae," Nature, Nature, vol. 464(7285), pages 66-71, March.
    2. Chih-Ying Su & Karen Menuz & Johannes Reisert & John R. Carlson, 2012. "Non-synaptic inhibition between grouped neurons in an olfactory circuit," Nature, Nature, vol. 492(7427), pages 66-71, December.
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