Fine structure of the spermatozoa of Crassostrea gigas (Mollusca, Bivalvia)

Molecular Reproduction and Development
M Gràcia BozzoM Durfort

Abstract

We describe sperm ultrastructure and acrosome differentiation during spermiogenesis in Crassostrea gigas (Mollusca Bivalvia). The sperm cell is a uniflagellated cell of the primitive type. The head region contains a rounded or conical nucleus surmounted by small acrosome. This organelle consists of a membrane-bound acrosomal granule, the contents of which have a homogeneous density, except in the anterior region, which is positive for PTA. The acrosome also surrounds the perforatorium, which includes oriented fibrillar elements: this is the axial body. The middle piece contains four mitochondria encircling two perpendicular centrioles. The distal centriole is provided with a system of mechanical fixation to the plasma membrane, consisting of nine fibers in radial arrangement. The tail flagellum, about 50 microns long, contains the usual microtubular axoneme.

References

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Citations

Jun 10, 2008·Micron : the International Research and Review Journal for Microscopy·Jun-Quan ZhuWan-Xi Yang
Oct 25, 2011·Micron : the International Research and Review Journal for Microscopy·Olga V Yurchenko
Apr 8, 2017·Histochemistry and Cell Biology·Liliana MilaniMaria Gabriella Maurizii
May 18, 2013·Asian Pacific Journal of Cancer Prevention : APJCP·Redhwan Ahmed Al-NaggarNor Aini Binti Mohd Noor
Sep 6, 2005·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Demetrio RaldúaJoan Cerdà

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