PMID: 6160956Jan 1, 1980Paper

A Drosophila melanogaster cell line tested for the presence of active NORs by silver staining

Chromosoma
E Privitera

Abstract

Silver staining was used to detect active NORs in a Drosophila melanogaster cell line (C1 82) characterized by dimorphic X chromosomes (XXL), one of the two Xs showing a marked increase in heterochromatin where the nucleolar organizer (NO) is located. The Q-banding technique was used to determine the karyotype characteristics of the line. Ag-positive NORs appeared only on structurally changed X chromosomes (XL), both in diploid and tetraploid cells, indicating that rRNA genes of XL are more active or numerous than those on normal homologues. A possible relationship between NOR stainability, the presence of an increased heterochromatic portion and the selective advantage of XXL cells, recurrent in numerous Drosophila female lines, is discussed.

References

Sep 1, 1976·Experimental Cell Research·D A MillerO J Miller
Mar 1, 1977·Canadian Journal of Genetics and Cytology. Journal Canadien De Génétique Et De Cytologie·O G Ward
May 23, 1977·Chromosoma·J M Varley
Jan 1, 1977·Cytogenetics and Cell Genetics·R TantravahiO J Miller
Nov 1, 1970·In Vitro·G Echalier, A Ohanessian
Apr 1, 1965·Proceedings of the National Academy of Sciences of the United States of America·F M RITOSSA, S SPIEGELMAN

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Citations

Mar 4, 2006·Pathology, Research and Practice·Paweł MadejTomasz Rutkowski

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