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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)
2015
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
EISSN1520-5851
Volume49Issue:24Pages:14036-14047
SubtypeArticle
AbstractArbuscular 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.
Subject AreaEngineering; Environmental Sciences & Ecology
DOI10.1021/acs.est.5b03659
Indexed BySCI ; ADS ; EI
Language英语
WOS Research AreaEngineering, Environmental ; Environmental Sciences
WOS SubjectEngineering ; Environmental Sciences & Ecology
WOS IDWOS:000366872300019
ADS Bibcode2015EnST...4914036W
ADS URLhttps://ui.adsabs.harvard.edu/abs/2015EnST...4914036W
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2015EnST...4914036W/citations
Citation statistics
Cited Times:9 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/229076
Collection多学科研究中心
Recommended Citation
GB/T 7714
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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