Radiation-Induced Chromatid Aberrations in the G₁ Phase of Crepis Capillaris Cells

SUMMARY

Along with chromosome aberrations, ₁₃₇Cs gamma-irradiation in high doses induces chromatid aberrations in the pre-synthetic phase G₁ of the naturally synchronized cell population of embryonic radicles in C. capillaris seeds. This occurs in seeds with an artificially decreased moisture content.

The irradiation of dry seeds seems to induce primary chromosome lesions of two qualitatively different types. In addition to usual short-lived potential lesions appearing in G₁ as chromosome rearrangements, long-lived potential lesions that survive till the S phase to be fixed as chromatid aberrations also develop.