Arbuscular mycorrhizal fungi facilitate the uptake of radiocesium by Eleutherococcus sciadophylloides (araliaceae) - a pot-scale and field survey
Arbuscular mycorrhizal fungi facilitate the uptake of radiocesium by Eleutherococcus sciadophylloides (araliaceae) - a pot-scale and field survey
复制标题
丛枝菌根真菌促进刺五加科（五加科）对放射铯的吸收——盆栽和现场调查
DOI：
10.1080/13416979.2021.1881229
复制
发表时间：
2021
影响因子：
1.5
通讯作者：
Matsuda Yosuke
中科院分区：
文献类型：
--
作者：
Takenaka Chisato;Fukushi Akihisa;Matsuda Yosuke
福岛第一核电站事故引起的放射性铯（137 Cs）污染已对森林生态系统造成严重威胁。植物修复是一种有效的污染治理方法，对生态系统的干扰小于砍伐树木和土壤清除，而五加（Eleutherococcus scidophylloidae）是日本的一种137Cs富集树种。然而，积累机制并不十分清楚。本文旨在阐明丛枝菌根真菌（AMF）的定殖对E. sciadophylloides基于田间和温室实验。在温室实验中，我们使用了一个带有网格分区的生长盆系统，这使得能够分别确认来自树根的AMF菌丝的贡献。此外，由于根际钾与137Cs的吸收有关，我们还试图阐明AMF在E.在K.田间调查的半定量分析表明，AMF定殖与E细根中的放射性存在显著的正相关。sciadophylloides。盆栽试验结果表明，AMF对E.根际施钾能协同提高AMF对137Cs的吸收。本研究结果为AMF和K强化E. sciadophylloides。
Radiocesium (137Cs) contamination caused by the Fukushima Daiichi Nuclear Power Plant accident has posed a serious problem, especially for forest ecosystems. Phytoremediation is an effective decontamination method with less disturbance to the ecosystems than tree felling and soil removal.Eleutherococcus sciadophylloidesis one of the137Cs-accumulating tree species in Japan. However, the accumulation mechanism is not well understood. Herein, we aimed to clarify the contribution of the colonization of arbuscular mycorrhizal fungi (AMF) to137Cs uptake byE. sciadophylloidesbased on both field and greenhouse experiments. In the greenhouse experiment, we used a growth pot system with a mesh partition, which enable to confirm separately the contribution of AMF hyphae from tree roots. In addition, because potassium (K) in the rhizosphere is related to137Cs uptake, we also aimed to clarify the role of AMF in137Cs uptake byE. sciadophylloidesin the presence of K. Semi-quantitative analysis of the field survey revealed a significant and positive relationship between AMF colonization and radioactivity in the fine roots ofE. sciadophylloides. The pot experiments with K treatment indicated that AMF contributes to137Cs uptake byE. sciadophylloidesthrough its hyphae, and that the addition of K into the rhizosphere was effective in increasing the137Cs uptake synergistically by AMF colonization. These results could prove helpful to future applications of AMF and K for enhanced phytoremediation of137Cs byE. sciadophylloides.