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2 August 2020 A Survey of Chemoreceptive Responses on Different Mosquito Appendages
Liu Yang, Natasha Agramonte, Kenneth J. Linthicum, Jeffrey R. Bloomquist
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Abstract

Research on the functions of insect chemoreceptors have primarily focused on antennae (olfactory receptors) and mouthparts (gustatory receptors). However, chemoreceptive sensilla are also present on other appendages, such as the leg tarsi and the anterior wing margin, and their specific roles in chemoreception and mosquito behavior remain largely unknown. In this study, electrophysiological analyses in an electroantennogram recording format were performed on Aedes aegypti (L., Diptera: Culicidae) antennae, mouthparts, tarsi, and wings during exposure to a variety of insect repellent and attractant compounds. The results provide evidence that the tarsi and wings can sense chemicals in a gaseous form, and that the odors produce differing responses on different appendages. The most consistent and strongest response occurred when exposed to triethylamine (TEA). Antennae and mouthparts showed nearly identical responses pattern to all tested compounds, and their rank orders of effectiveness were similar to those of fore- and mid-leg tarsi. Hindleg tarsi only responded to TEA, indicating that the hind legs are not as chemoreceptive. Wings responded to a range of odorants, but with a different rank order and voltage amplitude. Insights gleaned into the function of these appendages in insect chemoreception are discussed.

© The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Liu Yang, Natasha Agramonte, Kenneth J. Linthicum, and Jeffrey R. Bloomquist "A Survey of Chemoreceptive Responses on Different Mosquito Appendages," Journal of Medical Entomology 58(1), 475-479, (2 August 2020). https://doi.org/10.1093/jme/tjaa154
Received: 26 May 2020; Accepted: 27 June 2020; Published: 2 August 2020
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KEYWORDS
1-octen-3-ol
Aedes aegypti
DEET
electroantennogram
repellent
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