Abstract
General regularities of low dose-rate radiation effects were determined on plant seeds in laboratory experiments. Three groups of seeds were tested: young, old, and heat-stressed because aging and high temperature are the usual natural factors. Statistical modelling has shown that the adaptation processes have three components: primary injuring, late damaging, and selection, which is more intensive in the sensitive subpopulation of seeds. The relationship between inter- and intracellular processes was analyzed. The combination of radiation and heat stresses dramatically increases late damaging and selection at non-optimal temperatures which do not exceed the norm limits. This approach allows one to estimate the risks of instabilities accompanied by the accumulation of abnormalities, selection, and death of seedlings.
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Notes
- 1.
After the Second World War, Timofeeff-Ressovsky was sent by the regime first to a Stalinist camp near Karaganda, and then to Site No. 0215, a secret scientific laboratory in the South Urals. There, he headed pioneering studies of the biological effect of radionuclides and their impact on ecosystems. Many investigators who later gained scientific repute worked at the Timofeeff-Ressovsky laboratory; the others came there for discussion. Among these scientists were V.I. Korogodin, G.G. Polikarpov, A.A. Lyapunov and others.
- 2.
The interval of middle-lethal doses corresponds to Fig. 4.1a
- 3.
The cells stimulated to proliferate are involved in the distributions.
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Korogodina, V.L., Florko, B.V., Osipova, L.P. (2013). Non-linearity Induced by Low-Dose Rates Irradiation. Lab Experiments on Pea Seeds. In: Radiation-Induced Processes of Adaptation. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6630-3_4
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