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Arsenic speciation transformation and arsenite influx and efflux across the cell membrane of fungi investigated using HPLC-HG-AFS and, in-situ XANES
Zeng, XB; Su, SM; Feng, QF; Wang, XR; Zhang, YZ; Zharig, LL; Jiang, S; Li, AG; Li, LF; Wang, YN; Wu, CX; Bai, LY; Duan, R
2015
Source PublicationCHEMOSPHERE
Volume119Pages:1163—1168
Subtype期刊文献
AbstractMicroorganisms dominated speciation of arsenic (As) play an important role in the biogeochemical cycling of As. In the study, species transformation of arsenite [As(III)] and As(III) influx and efflux across the cell membranes of Trichoderma asperellum SM-12F1, Penicillium janthinellum SM-12F4, and Fusarium oxysporum CZ-8F1 cells were studied using a cellular lysis plus chromatographic separation method and further the in-situ X-ray absorption near edge structure (XANES) analysis. The results indicated that As(III) can enter into fungal cells and that a portion of the As(III) can be exuded out of cells. For both As sequestrated into fungal cytoplasm and As adsorbtion onto cell walls, As(III) was found to be the dominated form of As. XANES analysis showed that As(III) accounted for 58.4%, 59.5%, and 73.0% of the total As in the cells of T. asperellum SM-12F1, P. janthinellum SM-12F4, and F. oxysporum CZ-8F1, respectively. Among these fungal strains, however, there were obvious differences in the relative proportions of arsenate [As(V)1, monomethylarsonic acid (MMA), and dimethylarsinic acid (DMA). For T. asperellum SM-12F1, the proportion (%) of MMA was 31.1%, and no As(V) or DMA was detected. For F. oxysporum CZ-8F1, the proportions of As(V) and MMA were 15.8% and 8.8%, respectively, but no DMA was observed. As(V), MMA, and DMA accounted for 4.2%, 29.5%, and 8.1%, respectively, of the P. janthinellum SM-12F4 cells. Some of the intracellular As(III) can be oxidated and methylated by these fungal strains and yield As(V), MMA, and DMA as products. (C) 2014 Elsevier Ltd. All rights reserved.
KeywordPenicillium-janthinellum Sm-12f4 Trichoderma-asperellum Sm-12f1 Fusarium-oxysporum Cz-8f1 Resistant Fungi Biotransformation Biovolatilization Detoxification Cyanobacteria Methylation Tolerance
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24397
Collection中科院上海应用物理研究所2011-2020年
Recommended Citation
GB/T 7714
Zeng, XB,Su, SM,Feng, QF,et al. Arsenic speciation transformation and arsenite influx and efflux across the cell membrane of fungi investigated using HPLC-HG-AFS and, in-situ XANES[J]. CHEMOSPHERE,2015,119:1163—1168.
APA Zeng, XB.,Su, SM.,Feng, QF.,Wang, XR.,Zhang, YZ.,...&Duan, R.(2015).Arsenic speciation transformation and arsenite influx and efflux across the cell membrane of fungi investigated using HPLC-HG-AFS and, in-situ XANES.CHEMOSPHERE,119,1163—1168.
MLA Zeng, XB,et al."Arsenic speciation transformation and arsenite influx and efflux across the cell membrane of fungi investigated using HPLC-HG-AFS and, in-situ XANES".CHEMOSPHERE 119(2015):1163—1168.
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