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In may 2007, the ULiège's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (ULiège mandate).

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Journal Article

Journal Article

Oogenesis in mealworms: cell density of germarium, thickness of chorion and ecdysteroid production. Effects of regulators  [1997]

Soltani, N.; Soltani-Mazouni, N. (Universite de Annaba (Algeria). Dept. de biologie animale);

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Diflubenzuron (DFB), a benzoyl phenyl urea derivative, incorporated into the diet (5 and 10 mg/g) was evaluated on the ovarian development in mealworms (Tenebrio molitor). It caused a decrease in both the cell density of germarium and the thickness of chorion. Experiments were also conducted in vitro using ovaries cultured in presence of DFB (5 and 10 microg/ml medium) or an ovary maturating neurohormone (0.5 and 1 microg/ml medium). Results from control series showed a significant release of ecdysteroids in culture medium by ovaries of T. molitor. Moreover, this ovarian ecdysteroid release was stimulated by the ovary maturating neurohormone and reduced by DFB. All these findings and recent reports thus suggest that the reduction in fecundity observed in several insect species is probably due to interference of DFB with oogenesis via (a) the differentiation of cells as evidenced by the reduction of the number of nuclei in the germarium, and/or (b) the maturation of follicle by perturbations of both the incorporation of vitellogenic precursors into developing oocytes, the production of ecdysteroid by follicle cells and the formation of the chorion.
From the journal
Mededelingen - Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen Universiteit Gent (Belgium)
ISSN : 0368-9697

Bibliographic information

Language:
English
Type:
Summary
In AGRIS since:
1999
Volume:
62
Issue:
2b
Start Page:
565
End Page:
571
All titles:
"Oogenesis in mealworms: cell density of germarium, thickness of chorion and ecdysteroid production. Effects of regulators"@eng
Other:
"Summary (En)"
"2 ill., 2 tables, 29 ref."
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Bibliographic information

Language:
English
Type:
Summary
In AGRIS since:
1999
Volume:
62
Issue:
2b
Start Page:
565
End Page:
571
All titles:
"Oogenesis in mealworms: cell density of germarium, thickness of chorion and ecdysteroid production. Effects of regulators"@eng
Other:
"Summary (En)"
"2 ill., 2 tables, 29 ref."