Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges connecting spermatogenic cells in the black snail, Semisulcospira libertina (Mollusca, Mesogastropoda)

Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges between spermatogenic cells are described in the black snail, Semisulcospira libertina. The bundles were occasionally observed in bridges connecting spermatogonia, spermatocytes and typical spermatids. Relations b...

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Bibliographic Details
Published in:Tissue & cell 2005-02, Vol.37 (1), p.75-79
Main Authors: Okura, N., Kurihara, K., Yasuzumi, F.
Format: Article
Language:English
Subjects:
Actin Cytoskeleton - ultrastructure
Animals
Cell membrane
Cell Membrane - ultrastructure
Cross striation
Cytoplasm - ultrastructure
Cytoplasmic bridge
Male
Microfilament bundle
Microscopy, Electron, Transmission
Semisulcospira libertina
Snails - ultrastructure
Spermatids - ultrastructure
Spermatocytes - ultrastructure
Spermatogenic cell
Spermatogonia - ultrastructure
Testis - ultrastructure
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Description
Summary:Striated microfilament bundles attaching to the plasma membrane of cytoplasmic bridges between spermatogenic cells are described in the black snail, Semisulcospira libertina. The bundles were occasionally observed in bridges connecting spermatogonia, spermatocytes and typical spermatids. Relations between bundles and centrioles could not be detected. The bundle had electron dense cross bands with a periodicity of approximately 200 nm, and attached to the membrane with almost right angle at the cross linker level. Phalloidin cytochemistry revealed that the bundle contained F-actin. In a case, a bundle connected two cytoplasmic bridges.
ISSN:0040-8166
1532-3072
DOI:10.1016/j.tice.2004.10.001