Some Aspects of Spermiogenesis in the Domestic Pigeon

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  • Some Aspects of Spermiogenesis in the D

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Spermiogenesis of the dom e stic pigeon Columba livia domestica L. has been studied with the electron microscope. The proacrosomal granule occurring in the Golgi complex is well situated at the anterior pole of the spermatid nucleus. It was noticed that no electron-lucent acrosomal vesicle is visible during the formation of acrosome. Cytoplasmic microtubules appear originated from the amorphous or fibrillar material attached to an irregularly spaced, double-layered nuclear envelope. In correspondence with the appearance of microtubules there occurs the chromatin aggregation in the elongating nucleus. The tubular body has been found for the first time in the domestic pigeon spermatid so far as avian spermatids are concerned. The tubular body involving ribosomes may contribute to the protein synthesis available to metamorphosis of spermatids.

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