Ogo Sumika, Yamanaka Takashi, Akama Keiko, Nagakura Junko, Yamaji Keiko
Forestry and Forest Products Research Institute, Tsukuba, Japan.
College of Agrobiological Resource Science, Tsukuba University, Tsukuba, Japan.
Mycobiology. 2018 Dec 4;46(4):388-395. doi: 10.1080/12298093.2018.1538074. eCollection 2018.
Radionuclides were deposited at forest areas in eastern parts of Japan following the Fukushima Daiichi Nuclear Power Plant incident in March 2011. Ectomycorrhizal (EM) fungi have important effects on radiocaesium dynamics in forest ecosystems. We examined the effect of colonization by the EM fungus on the uptake of cesium (Cs) and potassium (K) by seedlings. Pine seedlings exhibited enhanced growth after the EM formation due to the colonization by . Additionally, the shoot Cs concentration increased after the EM formation when Cs was not added to the medium. This suggests that might be able to solubilize Cs fixed to soil particles. Moreover, the shoot K concentration increased significantly after the EM formation when Cs was added. However, there were no significant differences in the root K concentration between EM and non-EM seedlings. These results suggest that different mechanisms control the transfer of Cs and K from the root to the shoot of pine seedlings.
2011年3月福岛第一核电站事故后，放射性核素沉积在日本东部的森林地区。外生菌根（EM）真菌对森林生态系统中的放射性铯动态具有重要影响。我们研究了EM真菌定殖对幼苗吸收铯（Cs）和钾（K）的影响。松树幼苗在形成EM后由于[具体真菌名称缺失]的定殖而生长增强。此外，当培养基中不添加Cs时，形成EM后地上部分的Cs浓度增加。这表明[具体真菌名称缺失]可能能够溶解固定在土壤颗粒上的Cs。此外，当添加Cs时，形成EM后地上部分的K浓度显著增加。然而，EM幼苗和非EM幼苗的根中K浓度没有显著差异。这些结果表明，不同的机制控制着Cs和K从松树幼苗根部向地上部分的转运。
