pycnosis


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Related to pycnosis: pycnotic, pyknosis

pycnosis

the process of shrinking (and becoming more dense) in a cell nucleus, which results in its becoming strongly staining, usually as it dies.
References in periodicals archive ?
Janake (1992) found that pycnosis occurred in spermatogonia and spermatocyte cells ofPoecilocerus pictus when gonads were treated with endosulfan.
The sex chromosomes cannot be distinguished by their differential pycnosis in somatic metaphases of males and females (Figs.
Shibata and Shimada (1986) quantified damaged cells in crown tissue of orchardgrass (Dactylis glomerata L.) recovering from freezing and describe the cells as "degenerated and with nuclear pycnosis." They concluded that compared with control tissue, cells with nuclear pycnosis had been killed by freezing injury because they did not plasmolyze with Ca[Cl.sub.2] and they stained a weaker color with neutral red in hand sections that had not been exposed to fixative (Shibata and Shimada, 1986).