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Nagalakshmi, V.K., Department of Entomology, Hebrew University, Rehovot, Israel, Institute for Technology and Storage of Agricultural Products, ARO, Volcani Center, Bet Dagan, Israel
Applebaum, S.W., Department of Entomology, Hebrew University, Rehovot, Israel
Azrielli, A., Institute for Technology and Storage of Agricultural Products, ARO, Volcani Center, Bet Dagan, Israel
Rafaeli, A., Institute for Technology and Storage of Agricultural Products, ARO, Volcani Center, Bet Dagan, Israel, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Insect males produce accessory gland (MAG) factors that are transferred in the seminal fluid to females during copulation, and elicit changes in the mated female's behavior and physiology. Our previous studies showed that the injection of synthetic Drosophila melanogoster sex-peptide (DrmSP) into virgin females of the moth Helicoverpa armigera causes a significant inhibition of pheromone production. In this and other moth species, pheromone production, correlated with female receptivity, is under neuroendocrine control due to the circadian release of the neuropeptide PBAN. In this study, we show that PBAN, present in the hemolymph during the scotophase in females, is drastically reduced after mating. We also identify 4 DrmSP-like HPLC peaks (Peaks A, S1, S2, and B) in MAGs, with increasing levels of DrmSP immunoreactivity during the scotophase, when compared to their levels observed during the photophase. In H. armigera MAGs, a significant reduction in the pheromonostatic peak (Peak B) was already evident after 15 min of copulation, and depletion of an additional peak (Peak S2) was evident after complete mating. Peak A is also detected in female brains, increasing significantly 1 h after mating, at which time inhibition of pheromone biosynthesis also occurs. However, changes corresponding to the other MAG peaks were not detected in mated female tissues. © 2007 Wiley-Liss, Inc.
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תנאי שימוש
Female sex pheromone suppression and the fate of sex-peptide-like peptides in mated moths of Helicoverpa armigera
64
Nagalakshmi, V.K., Department of Entomology, Hebrew University, Rehovot, Israel, Institute for Technology and Storage of Agricultural Products, ARO, Volcani Center, Bet Dagan, Israel
Applebaum, S.W., Department of Entomology, Hebrew University, Rehovot, Israel
Azrielli, A., Institute for Technology and Storage of Agricultural Products, ARO, Volcani Center, Bet Dagan, Israel
Rafaeli, A., Institute for Technology and Storage of Agricultural Products, ARO, Volcani Center, Bet Dagan, Israel, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Female sex pheromone suppression and the fate of sex-peptide-like peptides in mated moths of Helicoverpa armigera
Insect males produce accessory gland (MAG) factors that are transferred in the seminal fluid to females during copulation, and elicit changes in the mated female's behavior and physiology. Our previous studies showed that the injection of synthetic Drosophila melanogoster sex-peptide (DrmSP) into virgin females of the moth Helicoverpa armigera causes a significant inhibition of pheromone production. In this and other moth species, pheromone production, correlated with female receptivity, is under neuroendocrine control due to the circadian release of the neuropeptide PBAN. In this study, we show that PBAN, present in the hemolymph during the scotophase in females, is drastically reduced after mating. We also identify 4 DrmSP-like HPLC peaks (Peaks A, S1, S2, and B) in MAGs, with increasing levels of DrmSP immunoreactivity during the scotophase, when compared to their levels observed during the photophase. In H. armigera MAGs, a significant reduction in the pheromonostatic peak (Peak B) was already evident after 15 min of copulation, and depletion of an additional peak (Peak S2) was evident after complete mating. Peak A is also detected in female brains, increasing significantly 1 h after mating, at which time inhibition of pheromone biosynthesis also occurs. However, changes corresponding to the other MAG peaks were not detected in mated female tissues. © 2007 Wiley-Liss, Inc.
Scientific Publication
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