期刊
JOURNAL OF MEDICAL ENTOMOLOGY
卷 58, 期 1, 页码 475-479出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/jme/tjaa154
关键词
Aedes aegypti; DEET; 1-octen-3-ol; electroantennogram; repellent
资金
- Unites States Department of Defense, Deployed War Fighter Research Program, under USDA [58-6615-4-023, 59-6063-8-001]
Research on insect chemoreceptors has primarily focused on antennae and mouthparts, but this study found that chemoreceptive sensilla are also present on other appendages such as leg tarsi and wings. The study showed that tarsi and wings can sense chemicals in a gaseous form, with differing responses to different compounds. Antennae and mouthparts responded similarly to all tested compounds, unlike the leg tarsi which showed variations in response.
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.
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