Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Non-linear Responses of Hordeum vulgare Germs to Low Doses of Ionizing Radiation

  • Kim, Jin-Kyu (Korea Atomic Energy Research Institute) ;
  • Alla A. Oudalova (Russian Institute of Agricultural Radiology and Agroecology) ;
  • Vladimir G. Dikarev (Russian Institute of Agricultural Radiology and Agroecology)
  • Published : 2003.12.01
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Abstract

The induction of chromosome aberrations in Hordeum vulgare germs after irradiation is studied for the dose range of 10 to 1,000 mGy. The relationship between the frequency of aberrant cells and the absorbed dose is shown to be non -linear and has a dose-independent plateau within the range of 56-467 mGy where the level of cytogenetic damage is statistically significantly distinguished from the spontaneous level. The comparison of the goodness of the experimental data fitting with mathematical models of different complexities, using the most common quantitative criteria, demonstrates the benefit of the piecewise linear model over the linear and polynomial ones in approximating the cytogenetical disturbance frequency. The results of our study support the conclusion about indirect mechanism of chromosome aberrations induced by low doses or dose rates mutagenesis.

Keywords

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