Evidence against an antiaphrodisiac role for cis-vaccenyl acetate in Drosophila melanogaster |
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Institution: | 1. Crop Science Department, Universidade Federal do Paraná, R. dos Funcionários, 1540, Curitiba, 80035-050, Brazil;2. Pathology Department, Universidade Federal do Paraná, Av. Cel. Francisco H. dos Santos, s/n, Curitiba, 81531-980, Brazil;3. Chemistry Department, Universidade Federal do Paraná, Av. Cel. Francisco H. dos Santos, s/n, Curitiba, 81531-980, Brazil;1. Department of Microbiology, Saaii College of Medical Science and Technology, Chaubepur, Kanpur 209203, India;2. Microbiology and Microbial Biotechnology Laboratory, Department of Botany, University of Gour Banga, Malda, West Bengal 732103, India;1. Department of Ophthalmology, Queen Mary Hospital (institution where the study took place), Hong Kong SAR, People''s Republic of China;2. Hong Kong Eye Hospital (current affiliated institution), Hong Kong SAR, People''s Republic of China;3. Department of Ophthalmology, Caritas Medical Centre, Hong Kong SAR, People''s Republic of China;4. Department of Ophthalmology, The University of Hong Kong, Hong Kong SAR, People''s Republic of China |
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Abstract: | The male lipid of Drosophila melanogaster, cis-vaccenyl acetate, is transferred to females during mating, and reduces the attractiveness of virgin females when applied topically. This has led to the hypothesis that cis-vaccenyl acetate functions as a mated-female antiaphrodisiac. Using gas chromatography, we measured the cis-vaccenyl acetate recovered from female reproductive tracts and cuticular washes at various times after mating to investigate whether cis-vaccenyl acetate meets criteria that would be expected of an antiaphrodisiac pheromone in this species. Our results do not indicate a direct antiaphrodisiac role for cis-vaccenyl acetate. Specifically, cis-vaccenyl acetate is not transferred to females within the first 3 min of copulation, even though the first 3 min are sufficient to induce the post-mating loss of attractiveness characteristic of D. melanogaster females. Furthermore, the cis-vaccenyl acetate on the female's cuticle at any time after mating is probably not sufficient to effectively inhibit courtship, and no detectable transfer to the cuticle occurs during exposure to courting males. These results suggest that cis-vaccenyl acetate plays a limited role, if any, as a D. melanogaster antiaphrodisiac. |
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