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Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses

文献类型：期刊论文

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作者Wu, SL; Zhang, X; Sun, YQ; Wu, ZX; Li, T; Hu, YJ; Lv, JT; Li, G; Zhang, ZS; Zhang, J
刊名JOURNAL OF HAZARDOUS MATERIALS ; JOURNAL OF HAZARDOUS MATERIALS
出版日期2016 ; 2016
卷号316页码:34-42
关键词Arbuscular mycorrhizal fungi Chromium SEM-EDS STXM XAFS Arbuscular mycorrhizal fungi Chromium SEM-EDS STXM XAFS
ISSN号0304-3894
DOI10.1016/j.jhazmat.2016.05.017 ; 10.1016/j.jhazmat.2016.05.017
文献子类期刊论文 ; Article
英文摘要Arbuscular 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.; Arbuscular 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.
电子版国际标准刊号1873-3336
WOS关键词ORGAN-CULTURE CONDITIONS ; NEAR-EDGE STRUCTURE ; GLOMUS-INTRARADICES ; EXTRARADICAL MYCELIUM ; HEXAVALENT CHROMIUM ; CYNODON-DACTYLON ; MINE TAILINGS ; CELL-WALL ; PLANT ; ABSORPTION ; ORGAN-CULTURE CONDITIONS ; NEAR-EDGE STRUCTURE ; GLOMUS-INTRARADICES ; EXTRARADICAL MYCELIUM ; HEXAVALENT CHROMIUM ; CYNODON-DACTYLON ; MINE TAILINGS ; CELL-WALL ; PLANT ; ABSORPTION
语种英语 ; 英语
WOS记录号WOS:000379564700005 ; WOS:000379564700005
源URL[http://ir.ihep.ac.cn/handle/311005/260269]  
专题高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714		 Wu, SL,Zhang, X,Sun, YQ,et al. Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses, Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses[J]. JOURNAL OF HAZARDOUS MATERIALS, JOURNAL OF HAZARDOUS MATERIALS,2016, 2016,316, 316:34-42, 34-42.
APA Wu, SL.,Zhang, X.,Sun, YQ.,Wu, ZX.,Li, T.,...&郑黎荣.(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.

入库方式： OAI收割

来源：高能物理研究所

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