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Quarterly Journal of Microscopical Science, Vol s3-103, 411-415, Copyright © 1962 by Company of Biologists

The Structure and Function of the So-Called Yolk-Nucleus in the Oogenesis of Birds

SARDUL S. GURAYA 1

1 Department of Zoology, University of Gorakhpur, Gorakhpur, India

The so-called yolk-nucleus of the young oocytes of birds is situated close to the nucleus. It is a homogeneous, spherical mass with radiating projections. Histochemical tests show it to be rich in RNA. Lipid bodies of diverse nature and mitochondria are aggregated in its vicinity. The yolk-nucleus disintegrates as the yolk-bodies are formed, and meanwhile the cytoplasmic inclusions that had aggregated round it seem to disperse and disappear. When the yolk-bodies have been fully formed, the yolk-nucleus is reconstituted once more as a homogeneous, spherical mass.






© The Company of Biologists Ltd 1962