Abstract
BROADLY speaking, the visible effects of ionizing radiations on the nucleus are of two kinds: first, the breakage of the chromosomes at sensitive phases of the nuclear cycle; secondly, the ‘primary’ effect of irradiation (stickiness), which may be typified as a condition showing fluidity of chromosome outline, internal vacuolation and adhesion of sister chromatids at anaphase. In Trillium root-tips, with a dose of 90 r. X-rays and at 20° C., its onset would precede that of the chromosome breaks, appearing at four to five hours after irradiation. The onset, intensity and spread of both effects is subject to the kind of ionization, the dose and environmental factors1.
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References
Darlington, C. D., and La Cour, L. F., J. Genet., 46, 180 (1945).
Darlington, C. D., and La Cour, L. F., J. Genet., 40, 185 (1940).
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LA COUR, L. Combined Effects of X-Rays and Temperature on Mitosis. Nature 167, 318–319 (1951). https://doi.org/10.1038/167318c0
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DOI: https://doi.org/10.1038/167318c0
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