Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Fine structure of the early stages of spermatogenesis in the Pacific oyster, Crassostrea gigas (Mollusca, Bivalvia)

Abstract : The aim of this study is to describe the early stages of spermatogenesis of the Pacific oyster Crassostrea gigas using both light and electron microscopy. The gonad is formed by gonadal tubules invaginated in a connective tissue constituting a storage tissue. Myoepithelial cells surround each gonadal tubule and are associated with an acellular matrix delimiting the outer part of the tubule, the inner part is composed by intragonadal somatic cells associated with germinal lineage. Two types of spermatogonia are identified, where type I spermatogonia (Spg I) are large, scarce and pale cells leaned against the base of the tubule (nuclear diameter: 5.5 ± 0.5 μm). Type II spermatogonia (Spg II) are clustered and dark cells which appear smaller than type I (nuclear diameter: 4.3 ± 0.3 μm). The aspect of nuage-like material in cytoplasm is described from pale spermatogonia to primary spermatocytes (nuclear diameter: pachytene 3.6 ± 0.3 μm, diplotene 3.4 ± 0.3 μm), while no structure related to a chromatoid body was observed in oyster spermatocytes and spermatids.
Liste complète des métadonnées

https://hal-normandie-univ.archives-ouvertes.fr/hal-02296554
Contributeur : Pascal Sourdaine <>
Soumis le : mercredi 25 septembre 2019 - 12:01:34
Dernière modification le : jeudi 9 avril 2020 - 01:14:18

Identifiants

Citation

A. Franco, C. Heude Berthelin, D. Goux, P. Sourdaine, M. Mathieu. Fine structure of the early stages of spermatogenesis in the Pacific oyster, Crassostrea gigas (Mollusca, Bivalvia). Tissue and Cell, Elsevier, 2008, 40 (4), pp.251-260. ⟨10.1016/j.tice.2007.12.006⟩. ⟨hal-02296554⟩

Partager

Métriques

Consultations de la notice

29