Summary
We report on the size distribution of clones marked by mitotic recombination induced by several different doses of X-rays applied to 72 h oldDrosophila larvae. The results indicate that the radiation significantly reduces the number of cells which undergo normal proliferation in the imaginal wing disc. We estimate that 1000 r reduces by 40–60% the number of cells capable of making a normal contribution to the development of the adult wing. Part of this reduction is due to severe curtailment in the proliferative ability of cells which nevertheless remain capable of adult differentiation; this effect is possibly due to radiation-induced aneuploidy. Cytological evidence suggests that immediate cell death also occurs as a result of radiation doses as low as 100 r. The surviving cells are stimulated to undergo additional proliferation in response to the X-ray damage so that the result is the differentiation of a normal wing.
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Haynie, J.L., Bryant, P.J. The effects of X-rays on the proliferation dynamics of cells in the imaginal wing disc ofDrosophila melanogaster . Wilhelm Roux' Archiv 183, 85–100 (1977). https://doi.org/10.1007/BF00848779
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DOI: https://doi.org/10.1007/BF00848779