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Cited by 273

The DOI matches its Crossref record; 35 of the 35 references it cites were found in a registry or an index.

Bacterial Populations Associated with the Oxidation and Reduction of Arsenic in an Unsaturated Soil

Macur, Richard E., Jackson, Colin R., Botero, Lina M., Mcdermott, Timothy R., Inskeep, William P.·2004·Environmental Science & Technology
DOI 10.1021/es034455a
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Abstract

Microbial populations responsible for the oxidation and reduction of As were examined in unsaturated (aerobic) soil columns treated with 75 microM arsenite [As(III)] or 250 microM arsenate [As(V)]. Arsenite [As(III)] was rapidly oxidized to As(V) via microbial activity, whereas no apparent reduction of As(V) was observed in the column experiments. Eight aerobic heterotrophic bacteria with varying As redox phenotypes were isolated from the same columns. Three isolates, identified as Agrobacterium tumefaciens-, Pseudomonas fluorescens-, and Variovorax paradoxus-like organisms (based on 16S sequence), were As(III) oxidizers, and all were detected in community DNA fingerprints generated by PCR coupled with denaturing gradient gel electrophoresis. The five other isolates were identified (16S gene sequence) as A. tumefaciens, Flavobacterium sp., Microbacterium sp., and two Arthrobacter sp. -like organisms and were shown to rapidly reduce As(V) under aerobic conditions. Although the two A. tumefaciens-like isolates exhibited opposite As redox activity,their 16S rDNA sequences (approximately 1400 bp) were 100% identical, and both were shown to contain putative arsC genes. Our results support the hypothesis that bacteria capable of either oxidizing As(III) or reducing As(V) coexist and are ubiquitous in soil environments, suggesting that the relative abundance and metabolic activity of specific microbial populations plays an important role in the speciation of inorganic As in soil pore waters.

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Metadata

Authors
Macur, R. E., Jackson, C. R., Botero, L. M., Mcdermott, T. R., & Inskeep, W. P.
Venue
Environmental Science & Technology
Publisher
American Chemical Society (ACS)
Published
2003-11-27
Volume
38
Issue
1
Pages
104-111
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
DOI
10.1021/es034455a
OpenAlex
W2015540203
Cited by
273
References
35
FWCI
8.74
Type
journal article
Language
en
Open access
closed

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