Endocrine control of oögenesis in the housefly Musca domestica vicina

Sakurai, H.

Journal of Insect Physiology 23(10): 1295-1302


ISSN/ISBN: 0022-1910
PMID: 599297
Accession: 005356906

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The endocrine system involved in the control of oogenesis in the housefly, M. d. vicina, was investigated. Allatectomy, decapitation and starvation of newly emerged females resulted in inhibition of oogenesis, showing a close relationship between enlargement of the corpus allatum and growth of follicles during the first oogenesis. Histological observation of sexually matured females showed active secretion of the corpus allatum and the medial neurosecretory cells of the pars intercerebralis. Topical application of juvenile hormone [JH] analogues (JHA) to the allatectomized fly induced the growth of ovary, and critical doses of methoprene and methyl-7,11-diethyl-juvenate for the maturation of the ovary were determined. JHA stimulated initiation of oogenesis in the starved or decapitated flies as well as vitellogenesis in the sugar-fed one; JH acted not only as a gonadotropin but also as a vitellogenesis regulator. JHA stimulated cell lysis in pupal fat body of female flies, indicating a possible influence of JH on the process of releasing vitellogenin.