Watanabe Yoshito, Ichikawa San'ei, Kubota Masahide, Hoshino Junko, Kubota Yoshihisa, Maruyama Kouichi, Fuma Shoichi, Kawaguchi Isao, Yoschenko Vasyl I, Yoshida Satoshi
Fukushima Project Headquarters, National Institute of Radiological Sciences, Chiba 2638555, Japan.
Japan Wildlife Research Centre, Tokyo 1308606, Japan.
Sci Rep. 2015 Aug 28;5:13232. doi: 10.1038/srep13232.
After the accident at the Fukushima Daiichi Nuclear Power Plant (F1NPP) in March 2011, much attention has been paid to the biological consequences of the released radionuclides into the surrounding area. We investigated the morphological changes in Japanese fir, a Japanese endemic native conifer, at locations near the F1NPP. Japanese fir populations near the F1NPP showed a significantly increased number of morphological defects, involving deletions of leader shoots of the main axis, compared to a control population far from the F1NPP. The frequency of the defects corresponded to the radioactive contamination levels of the observation sites. A significant increase in deletions of the leader shoots became apparent in those that elongated after the spring of 2012, a year after the accident. These results suggest possibility that the contamination by radionuclides contributed to the morphological defects in Japanese fir trees in the area near the F1NPP.
2011年3月福岛第一核电站（F1NPP）事故发生后，人们高度关注释放到周边地区的放射性核素对生物的影响。我们调查了日本特有的本土针叶树日本冷杉在F1NPP附近地区的形态变化。与远离F1NPP的对照种群相比，F1NPP附近的日本冷杉种群出现形态缺陷的数量显著增加，包括主轴顶梢缺失。这些缺陷的频率与观测地点的放射性污染水平相对应。在事故发生一年后的2012年春季之后伸长的顶梢中，顶梢缺失明显增加。这些结果表明，放射性核素污染可能导致了F1NPP附近地区日本冷杉树的形态缺陷。
