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http://dx.doi.org/10.1080/12298093.2018.1538074

Influence of Ectomycorrhizal Colonization on Cesium Uptake by Pinus densiflora Seedlings  

Ogo, Sumika (Forestry and Forest Products Research Institute)
Yamanaka, Takashi (Forestry and Forest Products Research Institute)
Akama, Keiko (Forestry and Forest Products Research Institute)
Nagakura, Junko (Forestry and Forest Products Research Institute)
Yamaji, Keiko (College of Agrobiological Resource Science, Tsukuba University)
Publication Information
Mycobiology / v.46, no.4, 2018 , pp. 388-395 More about this Journal
Abstract
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 Astraeus hygrometricus on the uptake of cesium (Cs) and potassium (K) by Pinus densiflora seedlings. Pine seedlings exhibited enhanced growth after the EM formation due to the colonization by A. hygrometricus. Additionally, the shoot Cs concentration increased after the EM formation when Cs was not added to the medium. This suggests that A. hygrometricus 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.
Keywords
Astraeus; mycorrhizal synthesis; pine; potassium; stable Cs;
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