NDLI: The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

Content Provider	Springer Nature Link
Author	Hou, Qi Hui Ma, An Zhou Lv, Di Bai, Zhi Hui Zhuang, Xu Liang Zhuang, Guo Qiang
Copyright Year	2014
Abstract	An Escherichia coli arsRp::luc-based biosensor was constructed to measure the bioavailability of arsenic (As) in soil. In previous induction experiments, it produced a linear response (R 2 = 0.96, P < 0.01) to As from 0.05 to 5 μmol/L after a 2-h incubation. Then, both chemical sequential extraction, Community Bureau of Reference recommended sequential extraction procedures (BCR-SEPs) and E. coli biosensor, were employed to assess the impact of different long-term fertilization regimes containing N, NP, NPK, M (manure), and NPK + M treatments on the bioavailability of arsenic (As) in soil. Per the BCR-SEPs analysis, the application of M and M + NPK led to a significant (P < 0.01) increase of exchangeable As (2–7 times and 2–5 times, respectively) and reducible As (1.5–2.5 times and 1.5–2.3 times, respectively) compared with the no fertilization treated soil (CK). In addition, direct contact assay of E. coli biosensor with soil particles also supported that bioavailable As in manure-fertilized (M and M + NPK) soil was significantly higher (P < 0.01) than that in CK soil (7 and 9 times, respectively). Organic carbon may be the major factor governing the increase of bioavailable As. More significantly, E. coli biosensor-determined As was only 18.46–85.17 % of exchangeable As and 20.68–90.1 % of reducible As based on BCR-SEPs. In conclusion, NKP fertilization was recommended as a more suitable regime in As-polluted soil especially with high As concentration, and this E. coli arsRp::luc-based biosensor was a more realistic approach in assessing the bioavailability of As in soil since it would not overrate the risk of As to the environment.
Starting Page	6137
Ending Page	6146
Page Count	10
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	98
Issue Number	13
e-ISSN	14320614
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-04-01
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Long-term fertilization Arsenic (As) pollution Bioavailability Sequential extraction Microbial biosensor Microbiology Microbial Genetics and Genomics Biotechnology
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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