Mating Effect on Sex Pheromone Production of the Oriental tobacco budworm,Helicoverpa assulta |
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| Institution: | 1. Graduate School of Agricultural Biotechnology, Seoul National University, Suwon 441–744;2. Department of Entomology, Iowa State University, Ames, Iowa 50011–3222, USA;1. Emergency Department, Hospital Clínic, IDIBAPS, University of Barcelona, Barcelona, Catalonia, Spain;2. Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, United Kingdom;3. Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain;4. CIBER de enfermedades CardioVasculares (CIBERCV), Madrid, Spain;5. Emergency Department, Hospital Clínico San Carlos, Universidad Complutense, Madrid, Spain;6. Cardiology Department, Hospital 12 de Octubre, Universidad Complutense, Madrid, Spain;7. Emergency Department, Short-Stay Unit and Home Hospitalization, Hospital General de Alicante, Alicante, Spain;8. Emergency Department, Hospital Universitario Central de Asturias, Oviedo, Asturias, Spain;9. Emergency Department, Hospital Universitari de Bellvitge, L’Hospitalet de Llobregat, Barcelona, Catalonia, Spain;10. Emergency Department, Hospital Reina Sofia de Murcia, Murcia, Spain;11. Emergency Department, Hospital Sant Pau i Santa Tecla de Tarragona, Tarragona, Catalonia, Spain;12. Emergency Department, Hospital Universitari de Vic, Barcelona, Catalonia, Spain;13. Emergency Department, Hospital Costa del Sol, Marbella, Málaga, Spain;14. Emergency Department, Hospital Universitario de Burgos, Burgos, Spain;15. Emergency Department, Hospital Doctor Peset, Valencia, Spain;p. Hospital General Universitario de Albacete, Albacete, Spain;1. Functional Genomics and Proteomics Group, Department of Biology, KU Leuven-University of Leuven, Belgium;2. Department of Teacher Education, Leuven University College, Leuven, Belgium;3. Molecular Developmental Physiology and Signal Transduction Group, Department of Biology, KU Leuven-University of Leuven, Belgium;1. Department of Entomology and Plant Pathology; North Carolina State University; Raleigh, NC 27695, USA;2. Department of Statistics; North Carolina State University; Raleigh, NC 27695;1. Department of Evolution, Ecology, and Organismal Biology, 318 West 12th Avenue, Columbus, OH 43210, USA;2. Insect Control and Cotton Disease Research Unit, Southern Plains Agricultural Research Center, USDA-ARS, 2881 F&B Road, College Station, TX 77845, USA;3. Department of Entomology, Ohio State University, 318 West 12th Avenue, Columbus, OH 43210, USA;1. Faculty of Sciences, University of South Bohemia, 37005 Ceske Budejovice, Czech Republic;2. Biology Center, Academy of Sciences of the Czech Republic, 37005 Ceske Budejovice, Czech Republic |
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| Abstract: | This study was undertaken to clarify the suppression phenomenon of sex pheromone production after mating and its relationship to the physiological mechanism in adult females of Helicoverpa assulta, and determine the mating factor from males causing depletion of sex pheromonc production. Sex pheromone production of H. assulta females was mostly terminated in 3 hours after mating. Mated females maintained with a low titer of sex pheromone until 3 days when it started to increase again, which showed a characteristic of species mating more than once. The mated female again produced pheromone upon injection of pheromone biosynthesis activating neuropeptide (PBAN) or extracts of brain-suboesophageal ganglion complexes (Br-Sg) of mated female, which were shown similar pheromonotropic activities as compared with virgin females. These results indicated that the mating did not inhibit the receptivity of pheromone gland itself and PBAN biosynthesis in suboesophageal ganglion of the mated females. And it seems to support that the depletion of sex pheromone production is responsible for blocking of PBAN release from head. To investigate the mating factor from adult males, when extracts of reproductive organs of male were injected into hemocoel of virgin females evoking depletion of sex pheromone production as shown in mated female. The results suggest that a chemical substance(s) from the male reproductive organs could be responsible for the loss of sex pheromone biosynthesis in H. assulta. |
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