Transformation and Immobilization of Chromium by Arbuscular Mycorrhizal Fungi as Revealed by SEM-EDS, TEM-EDS, and XAFS
文献类型：期刊论文
| 作者 | Wu, Songlin; Zhang, Xin; Sun, Yuqing; Wu, Zhaoxiang; Li, Tao; Hu, Yajun; Su, Dan; Lv, Jitao; Li, Gang; Zhang, Zhensong
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2015-12-15 |
| 卷号 | 49期号:24页码:14036-14047 |
| 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. |
| 研究领域[WOS] | Engineering, Environmental ; Environmental Sciences |
| WOS记录号 | WOS:000366872300019 |
| 公开日期 | 2016-03-08 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32401]  |
| 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 | Wu, Songlin,Zhang, Xin,Sun, Yuqing,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, Songlin.,Zhang, Xin.,Sun, Yuqing.,Wu, Zhaoxiang.,Li, Tao.,...&Chen, Baodong.(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, Songlin,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. |
入库方式： OAI收割
来源：生态环境研究中心
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