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Journal of Insect Physiology
Fan, Y., Department of Entomology, The Hebrew Univ., P.O. Box 12, 76100, Rehovot, Israel, Shanghai Institute of Entomology, Academia Sinica, Shanghai, China
Rafaeli, A., Department of Stored Products, Volcani Centre, P.O. Box 6, 50250, Bet Dagan, Israel
Gileadi, C., Department of Stored Products, Volcani Centre, P.O. Box 6, 50250, Bet Dagan, Israel
Kubli, E., Zoological Institute, Univ. Zurich-Irchel, W., Zurich, Switzerland
Applebaum, S.W., Department of Entomology, The Hebrew Univ., P.O. Box 12, 76100, Rehovot, Israel
Previous studies demonstrate that virgin female adult Helicoverpa armigera (Lepidoptera: Noctuidae) moths exhibit calling behaviour and produce sex pheromone in scotophase from the day after emergence, and that mating turns off both of these pre-mating activities. In the fruit fly Drosophila melanogaster, a product of the male accessory glands, termed sex peptide (SP), has been identified as being responsible for suppressing female receptivity after transfer to the female genital tract during mating. Juvenile hormone (JH) production is activated in the D. melanogaster corpus allatum (CA) by SP in vitro. We herein demonstrate cross-reactivity of D. melanogaster SP in the H. armigera moth: JH production in photophase virgin female moth CA in vitro is directly activated in a dose-dependent manner by synthetic D. melanogaster SP, and concurrently inhibits pheromone biosynthesis activating neuropeptide (PBAN)-activated pheromone production by isolated pheromone glands of virgin females. Control peptides (locust adipokinetic hormone, AKH-I, and human corticotropin. ACTH) do not inhibit in vitro pheromone biosynthesis. Moreover, SP injected into virgin H. armigera females, decapitated 24 h after eclosion, or into scotophase virgin females, suppresses pheromone production. In the light of these results, we hypothesize the presumptive existence of a SP-like factor among the peptides transmitted to female H. armigera during copulation, inducing an increased level of JH production and depressing the levels of pheromone produced thereafter.
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תנאי שימוש
Drosophila melanogaster sex peptide stimulates juvenile hormone synthesis and depresses sex pheromone production in Helicoverpa armigera
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Fan, Y., Department of Entomology, The Hebrew Univ., P.O. Box 12, 76100, Rehovot, Israel, Shanghai Institute of Entomology, Academia Sinica, Shanghai, China
Rafaeli, A., Department of Stored Products, Volcani Centre, P.O. Box 6, 50250, Bet Dagan, Israel
Gileadi, C., Department of Stored Products, Volcani Centre, P.O. Box 6, 50250, Bet Dagan, Israel
Kubli, E., Zoological Institute, Univ. Zurich-Irchel, W., Zurich, Switzerland
Applebaum, S.W., Department of Entomology, The Hebrew Univ., P.O. Box 12, 76100, Rehovot, Israel
Drosophila melanogaster sex peptide stimulates juvenile hormone synthesis and depresses sex pheromone production in Helicoverpa armigera
Previous studies demonstrate that virgin female adult Helicoverpa armigera (Lepidoptera: Noctuidae) moths exhibit calling behaviour and produce sex pheromone in scotophase from the day after emergence, and that mating turns off both of these pre-mating activities. In the fruit fly Drosophila melanogaster, a product of the male accessory glands, termed sex peptide (SP), has been identified as being responsible for suppressing female receptivity after transfer to the female genital tract during mating. Juvenile hormone (JH) production is activated in the D. melanogaster corpus allatum (CA) by SP in vitro. We herein demonstrate cross-reactivity of D. melanogaster SP in the H. armigera moth: JH production in photophase virgin female moth CA in vitro is directly activated in a dose-dependent manner by synthetic D. melanogaster SP, and concurrently inhibits pheromone biosynthesis activating neuropeptide (PBAN)-activated pheromone production by isolated pheromone glands of virgin females. Control peptides (locust adipokinetic hormone, AKH-I, and human corticotropin. ACTH) do not inhibit in vitro pheromone biosynthesis. Moreover, SP injected into virgin H. armigera females, decapitated 24 h after eclosion, or into scotophase virgin females, suppresses pheromone production. In the light of these results, we hypothesize the presumptive existence of a SP-like factor among the peptides transmitted to female H. armigera during copulation, inducing an increased level of JH production and depressing the levels of pheromone produced thereafter.
Scientific Publication
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