Transformation and Immobilization of Chromium by Arbuscular Mycorrhizal Fungi as Revealed by SEM-EDS, TEM-EDS, and XAFS
Wu; SL; Zhang; X; Sun; YQ; Wu; ZX; Li; T; Hu; YJ; Su; D; Lv; JT; Li; G; Zhang; ZS; Zheng; LL; Zhang; J; Chen; BD; Zheng LR(郑黎荣); Zhang J(张静)
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
2015
卷号49期号:24页码:14036-14047
学科分类Engineering; Environmental Sciences & Ecology
DOI10.1021/acs.est.5b03659
文章类型Article
英文摘要Arbuscular mycorrhizal fungi (AMP), ubiquitous soil fungi that form symbiotic relationships with the majority of terrestrial plants, are known to play an important role in plant tolerance to chromium (Cr) contamination. However, the underlying mechanisms, especially the direct influences of AMP on the translocation and transformation of Cr in the soil-plant continuum, are still unresolved. In a two-compartment root-organ cultivation system, the extraradical mycelium (ERM) of mycorrhizal roots was treated with 0.05 mmol L-1 Cr(VI) for 12 days to investigate the uptake, translocation, and transformation of Cr(VI) by AMP using inductively coupled plasma mass spectrometry (ICP-MS), scanning electron microscopy equipped with energy-dispersive spectroscopy (SEM-EDS), transmission electron microscopy equipped with energy-dispersive spectroscopy (TEM-EDS), and X-ray-absorption fine structure (XAFS) technologies. The results indicated that AMF can immobilize quantities of Cr via reduction of Cr(VI) to Cr(III), forming Cr(III)-phosphate analogues, likely on the fungal surface. Besides this, we also confirmed that the extraradical mycelium (ERM) can actively take up Cr [either in the form of Cr(VI) or Cr(III)] and transport Cr [potentially in the form of Cr(III)-histidine analogues] to mycorrhizal roots but immobilize most of the Cr(III) in the fungal structures. Based on an X-ray absorption near-edge spectroscopy analysis of Cr(VI)-treated roots, we proposed that the intraradical fungal structures can also immobilize Cr within mycorrhizal roots. Our findings confirmed the immobilization of Cr by AMP, which plays an essential role in the Cr(VI) tolerance of AM symbioses.
类目[WOS]Engineering, Environmental ; Environmental Sciences
收录类别SCI ; EI
WOS记录号WOS:000366872300019
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/229076
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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Wu,SL,Zhang,et al. Transformation and Immobilization of Chromium by Arbuscular Mycorrhizal Fungi as Revealed by SEM-EDS, TEM-EDS, and XAFS[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2015,49(24):14036-14047.
APA Wu.,SL.,Zhang.,X.,Sun.,...&张静.(2015).Transformation and Immobilization of Chromium by Arbuscular Mycorrhizal Fungi as Revealed by SEM-EDS, TEM-EDS, and XAFS.ENVIRONMENTAL SCIENCE & TECHNOLOGY,49(24),14036-14047.
MLA Wu,et al."Transformation and Immobilization of Chromium by Arbuscular Mycorrhizal Fungi as Revealed by SEM-EDS, TEM-EDS, and XAFS".ENVIRONMENTAL SCIENCE & TECHNOLOGY 49.24(2015):14036-14047.
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