The Role of Ecdysteroids and Juvenoids in Vitellogenin Levels and Follicle Development in the Housefly, Musca domestica
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概要
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The dose dependent effects of ecdysterone on follicle development and vitellogenin concentration were observed in houseflies decapitated 24 hr after hormone treatment. Vitellogenin level induced by ecdysterone was maximally 5.7-fold greater than control flies. Vitellogenin was detectable in decapitated male flies treated with ecdysterone, but not in intact males. Juvenile hormone analog (methoprene) treatment did not induce any vitellogenin in male flies, whereas it induced approximately 4.4-fold the vitellogenin and follicle development in decapitated females over that of control flies. A large amount of vitellogenin was detectable in 70% of the ovariectomized females, but only a trace amount was found in male flies holding a vitellogenic ovary. Vitellogenin and ecdysteroid level were coincident and made a similarly shaped parabolic curve during the first gonotropic cycle. The maximal ecdysteroid level (18 ng/ml) appeared in the middle of the vitellogenic phase. Meanwhile, no ecdysteroid surge was found in the hemolymph of ovariectomized females or in that of males holding a vitellogenic ovary. A moderate level of ecdysteroids was detectable in the intact ovary during the vitellogenic and post-vitellogenic stage. The inability to stimulate oogenesis and vitellogenin synthesis in both sexes of houseflies by ecdysteroids and juvenoids is discussed.
- 日本応用動物昆虫学会の論文
- 1985-05-25
著者
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Izumi Susumu
Department Of Biology Tokyo Metropolitan University
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AGUI Noriaki
Department of Medical Entomology, National Institute of Infectious Diseases
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TOMINO SHIRO
Department of Biology, Tokyo Metropolitan University
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Tomino Shiro
Department Of Applied Science Okayama University Of Science
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Tomino Shiro
Department Of Biology Tokyo Metropolitan University
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Agui Noriaki
Department Of Medical Entomology National Institute Of Health
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Izumi Susumu
Department Of Biological Sciences Division Of Biochemistry Tokyo Metropolitan University
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