[The use of nucleolar characteristics in biotesting]

Abstract

The utility of the use of quantitative nucleolus characteristics (number, size) for the assessment of the influence of threshold levels of different factors on plant and animal genomes was established. It is recommended to use the most sensitive and informative indices, in particular, for cells with a few nucleoli--the size of single nucleoli and per cent of heteromorphic paired nucleoli, and for cells with many nucleoli--their number.