CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses
Wu, SL; Zhang, X; Sun, YQ; Wu, ZX; Li, T; Hu, YJ; Lv, JT; Li, G; Zhang, ZS; Zhang, J; Zheng, LR; Zhen, XJ; Chen, BD; Chen, BD (reprint author), 18 Shuangqing Rd, Beijing 100085, Peoples R China.
2016
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume316Pages:34-42
Subtype期刊论文
AbstractArbuscular mycorrhizal (AM) fungi can enhance plant Cr tolerance through immobilizing Cr in mycorrhizal roots. However, the detailed processes and mechanisms are unclear. The present study focused on cellular distribution and speciation of Cr in both extraradical mycelium (ERM) and mycorrhizal roots exposed to Cr(VI) by using field emission scanning electron microscopy equipped with energy dispersive X-ray spectrometer (FE-SEM-EDS), scanning transmission soft X-ray microscopy (STXM) and X-ray absorption fine structure (XAFS) spectroscopy techniques. We found that amounts of particles (possibly extracellular polymeric substances, EPS) were produced on the AM fungal surface upon Cr(VI) stress, which contributed greatly to Cr(VI) reduction and immobilization. With EDS of the surface of AM fungi exposed to various Cr(VI) levels, a positive correlation between Cr and P was revealed, suggesting that phosphate groups might act as counter ions of Cr(III), which was also confirmed by the XAFS analysis. Besides, STXM and XAFS analyses showed that Cr(VI) was reduced to Cr(III) in AM fungal structures (arbuscules, intraradical mycelium, etc.) and cell walls in mycorrhizal roots, and complexed possibly with carboxyl groups or histidine analogues. The present work provided evidence of Cr immobilization on fungal surface and in fungal structures in mycorrhizal roots at a cellular level, and thus unraveled the underlying mechanisms by which AM symbiosis immobilize Cr. (C) 2016 Elsevier B.V. All rights reserved.
KeywordArbuscular Mycorrhizal Fungi Chromium Sem-eds Stxm Xafs
DOI10.1016/j.jhazmat.2016.05.017
Indexed BySCI
Language英语
WOS IDWOS:000379564700005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/26449
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorChen, BD (reprint author), 18 Shuangqing Rd, Beijing 100085, Peoples R China.
Recommended Citation
GB/T 7714
Wu, SL,Zhang, X,Sun, YQ,et al. Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses[J]. JOURNAL OF HAZARDOUS MATERIALS,2016,316:34-42.
APA Wu, SL.,Zhang, X.,Sun, YQ.,Wu, ZX.,Li, T.,...&Chen, BD .(2016).Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses.JOURNAL OF HAZARDOUS MATERIALS,316,34-42.
MLA Wu, SL,et al."Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses".JOURNAL OF HAZARDOUS MATERIALS 316(2016):34-42.
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