Uptake and Intraradical Immobilization of Cadmium by Arbuscular Mycorrhizal Fungi as Revealed by a Stable Isotope Tracer and Synchrotron Radiation mu X-Ray Fluorescence Analysis

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	Uptake and Intraradical Immobilization of Cadmium by Arbuscular Mycorrhizal Fungi as Revealed by a Stable Isotope Tracer and Synchrotron Radiation mu X-Ray Fluorescence Analysis
	Chen, Baodong; Nayuki, Keiichiro; Kuga, Yukari; Zhang, Xin; Wu, Songlin; Ohtomo, Ryo
刊名	MICROBES AND ENVIRONMENTS
	2018-09-29
卷号	33 期号:3 页码:257-263
关键词	arbuscular mycorrhizal fungi cadmium stable isotope phytotoxicity synchrotron radiation mu X-ray fluorescence
ISSN号	1342-6311
文献子类	Article
英文摘要	Arbuscular mycorrhizal (AM) fungi can improve plant tolerance to heavy metal contamination. This detoxification ability may largely depend on how AM fungi influence the uptake and distribution of metals in host plants. Two experiments were performed in order to gain insights into the mechanisms underlying cadmium (Cd) tolerance in mycorrhizal plants. Stable isotope Cd-106 and compartmented pots were adopted to quantify the contribution of the AM fungus, Rhizophagus irregularis, to the uptake of Cd by Lotus japonicus. Moreover, synchrotron radiation mu X-ray fluorescence (SR-mu XRF) was applied to localize Cd in the mycorrhizal roots at the sub-cellular level. The results obtained indicated that mycorrhizal colonization markedly enhanced Cd immobilization in plant roots. Less Cd was partitioned to plant shoots when only hyphae had access to Cd in the hyphal compartment than when roots also had direct access to the Cd pool. SR-mu CRF imaging indicated that Cd absorbed by extraradical hyphae was translocated into intraradical fungal structures, in which arbuscules accumulated large amounts of Cd; however, plant cells without fungal structures and plant cell walls contained negligible amounts of Cd. The present results provide direct evidence for the intraradical immobilization of Cd absorbed by AM fungi, which may largely contribute to the enhanced tolerance of plants to Cd. Therefore, AM fungi may play a role in the phytostabilization of Cd-contaminated soil.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40693]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Chen, Baodong,Nayuki, Keiichiro,Kuga, Yukari,et al. Uptake and Intraradical Immobilization of Cadmium by Arbuscular Mycorrhizal Fungi as Revealed by a Stable Isotope Tracer and Synchrotron Radiation mu X-Ray Fluorescence Analysis[J]. MICROBES AND ENVIRONMENTS,2018,33(3):257-263.
APA	Chen, Baodong,Nayuki, Keiichiro,Kuga, Yukari,Zhang, Xin,Wu, Songlin,&Ohtomo, Ryo.(2018).Uptake and Intraradical Immobilization of Cadmium by Arbuscular Mycorrhizal Fungi as Revealed by a Stable Isotope Tracer and Synchrotron Radiation mu X-Ray Fluorescence Analysis.MICROBES AND ENVIRONMENTS,33(3),257-263.
MLA	Chen, Baodong,et al."Uptake and Intraradical Immobilization of Cadmium by Arbuscular Mycorrhizal Fungi as Revealed by a Stable Isotope Tracer and Synchrotron Radiation mu X-Ray Fluorescence Analysis".MICROBES AND ENVIRONMENTS 33.3(2018):257-263.