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Quarterly Journal of Microscopical Science, Vol s3-103, 369-376, Copyright © 1962 by Company of Biologists

The ‘Pseudochromosomes’ in the Primary Spermatocyte of the Water-Boatman, Notonecta Glauca

BHUPINDER N. SUD 1

1 Cytological Laboratory, Department of Zoology, University Museum, Oxford; Present address, Department of Zoology, Panjab University, Chandigarh 3, Panjab, India

The ‘pseudochromosomes’ in the primary spermatocyte of the water-boatman, Notonecta glauca, have been studied by phase-contrast microscopy and by the use of vital dyes and histochemical techniques.

They first appear in contact with an inner ‘chromatic’ nuclear membrane, then lie on an outer ‘achromatic’ nuclear membrane, and later they are seen free in the cytoplasm, where they disappear. They differ in their chemical composition from the calottes or juxta-nuclear bodies in the spermatid. They show considerable resemblance in their histochemical reactions with the nuclear ‘spireme’.

It is suggested that they consist of ribonucleoprotein rejected from the nucleus.






© The Company of Biologists Ltd 1962