Abstract
AbstractIn adult Lepidoptera the labial palps are best known for their role in CO2detection, but they can also bear sensilla chaetica which function is unknown. The number and distribution of sensilla chaetica in labial palps was studied using a bright field microscope. To determine if these sensilla have a gustatory function, we performed single sensillum electrophysiology recordings from palp and antennal sensilla of adult moths ofCydia pomonella(L.),Grapholita molesta(Busck) andLobesia botrana(Denis and Shieffermüller). Each sensillum was stimulated with 3 doses of one of four test stimulus (sucrose, fructose, KCl and NaCl). Overall, responses (spikes/s−1) increased with dose, and were higher in the palps than in the antennae, and higher to sugars than to salts. With sugars the response increased with concentration in the palp but not in the antenna. With salts there was a drop in response at the intermediate concentration. The number and position of sensilla chaetica on labial palps was variable among individuals. Sensilla were located in the most exposed areas of the palp. Differences in sensilla distribution were detected between species. Such differences among species and between palps and antenna suggest that taste sensilla on the palps have an unforeseen role in adaptation.
Funder
Ministerio de Economía y Competitividad
Publisher
Springer Science and Business Media LLC
Reference68 articles.
1. Cobb, M., Scott, K. & Pankratz, M. Gustation in Drosophila melanogaster. In Insect Taste (eds Newland, P. et al.) 1–38 (Taylor & Francis, 2009).
2. Marion-Poll, F. The gustatory system in insects. In The Senses: A Comprehensive Reference (ed. Fritzsch, B.) 148–168 (Elsevier, 2020).
3. Mitchell, B. K., Itagaki, H. & Rivet, M. P. Peripheral and central structures involved in insect gustation. Microsc. Res. Tech. 47, 401–415 (1999).
4. Hallberg, E. Fine-structural characteristics of the antennal sensilla of Agrotis segetum (Insecta: Lepidoptera). Cell Tissue Res. 218, 209–218 (1981).
5. Koh, Y. H., Park, K. C. & Boo, K. S. Antennal sensilla in adult Helicoverpa assulta (Lepidoptera, Noctuidae): Morphology, distribution, and ultrastructure. Ann. Entomol. Soc. Am. 88, 519–530 (1995).
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献