title: Further experimental evidence for the involvement of ecdysone in the control of meiotic reinitiation in oocytes of Locusta migratoria (Insecta, Orthoptera).
abstract: Ecdysone has recently been shown to be able to trigger meiotic reinitiation in vitro in submature oocytes of Locusta. In the present study we have experimentally depressed (by 60-70%) ecdysone biosynthesis in the ovaries of adult females by rearing them on a diet with a modified sterol profile. Mature oocytes from such females fail to undergo normal reinitiation, but when incubated in vitro, can be induced to break their meiotic arrest by the addition of exogenous ecdysone. These results lend further support to the hypothesis that in Locusta, ovarian ecdysone is involved in the control of meiotic reinitiation.
authors.affiliation: U.A. CNRS 672, Université Louis Pasteur, Strasbourg, France.
authors.forename: R
authors.initials: R
authors.lastname: Lanot
authors.forename: J
authors.initials: J
authors.lastname: Thiebold
authors.forename: M F
authors.initials: MF
authors.lastname: Costet-Corio
authors.forename: P
authors.initials: P
authors.lastname: Benveniste
authors.forename: J A
authors.initials: JA
authors.lastname: Hoffmann
mesh_terms: D000818:Animals; D004440:Ecdysone / Q000096:biosynthesis / Q000502:physiology*; D005260:Female; D006110:Grasshoppers / Q000502:physiology*; D008540:Meiosis; D009865:Oocytes / Q000166:cytology*; D010053:Ovary / Q000378:metabolism
chemical_list: D004440:Ecdysone