慢性辐射暴露改变了苏格兰松树种群细胞遗传学但不改变生殖指标的时间动态。
Chronic radiation exposure modifies temporal dynamics of cytogenetic but not reproductive indicators in Scots pine populations.
机构信息
Russian Institute of Radiology and Agroecology, Kievskoe shosse, 109 km, 249020, Obninsk, Russia.
Russian Institute of Radiology and Agroecology, Kievskoe shosse, 109 km, 249020, Obninsk, Russia; Obninsk Institute for Nuclear Power Engineering, National Research Nuclear University MEPhI, Obninsk, Russia.
出版信息
Environ Pollut. 2018 Aug;239:399-407. doi: 10.1016/j.envpol.2018.04.058. Epub 2018 Apr 19.
Over a period of 13 years (2003-2015), reproductive and cytogenetic effects are investigated in Scots pine populations growing in the Bryansk region of Russia radioactively contaminated as a result of the Chernobyl accident. In reference populations, the frequencies of cytogenetic abnormalities are shown to change with time in a cyclic manner. In chronically exposed populations, the cyclic patterns in temporal dynamics of cytogenetic abnormalities appear to be disturbed. In addition, a tendency to decrease in the frequencies of cytogenetic abnormalities with time as well as an increase in their variability with dose rate is revealed. In contrast, no significant impact of chronic radiation exposure on the time dynamics of reproductive indexes is detected. Finally, long-term observations on chronically exposed Scots pine populations revealed qualitative differences in the temporal dynamics of reproductive and cytogenetic indicators.
在 13 年的时间里（2003-2015 年），研究了因切尔诺贝利事故而受到放射性污染的俄罗斯布良斯克地区生长的苏格兰松种群的生殖和细胞遗传学效应。在参考种群中，细胞遗传学异常的频率随时间呈周期性变化。在长期暴露的种群中，细胞遗传学异常的时间动态的周期性模式似乎受到干扰。此外，还揭示了随着时间的推移细胞遗传学异常频率的下降趋势以及随着剂量率的增加其变异性的增加。相比之下，没有发现慢性辐射暴露对生殖指标时间动态的显著影响。最后，对长期暴露于慢性辐射的苏格兰松种群的观察表明，生殖和细胞遗传学指标的时间动态存在定性差异。
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