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Citation
Tags
HERO ID
1614969
Reference Type
Journal Article
Title
Arsenic methylation in soils and its relationship with microbial arsM abundance and diversity, and As speciation in rice
Author(s)
Zhao, F-J; Harris, E; Yan, J; Ma, J; Wu, L; Liu, W; McGrath, SP; Zhou, J; Zhu, Y-G
Year
2013
Is Peer Reviewed?
1
Journal
Environmental Science & Technology
ISSN:
0013-936X
EISSN:
1520-5851
Volume
47
Issue
13
Page Numbers
7147-7154
Language
English
PMID
23750559
DOI
10.1021/es304977m
URL
https://pubs.acs.org/doi/10.1021/es304977m
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Abstract
Methylation of arsenic in soil influences its environmental behavior and accumulation by plants, but little is known about the factors affecting As methylation. As speciation was determined in the pore waters of 6 soils from diverse geographical locations over 54 days of incubation under flooded conditions. The concentration of methylated As (monomethylarsonic acid, MMA, and dimethylarsinic acid, DMA) varied from 0 to 85 µg L-1 (0 - 69% of the total As in pore water). Two Bangladeshi paddy soils contaminated by irrigation of As-laden groundwater produced large concentrations of inorganic As but relatively little methylated As. Two contaminated paddy soils from China produced a transient peak of DMA during the early phase of incubation. Methylated As represented considerable proportions of the total soluble As in the two uncontaminated soils from the UK and US. The copy number of the microbial arsenite methyltransferase gene (arsM) correlated positively with soil pH. However, pore-water methylated As correlated negatively with pH or arsM copy number, and positively with dissolved organic C. GeoChip assay revealed considerable arsM diversity among the 6 soils, with 27 - 35 out of 66 sequences in the microarray being detected. As speciation in rice plants grown in the soils generally mirrored that in the pore water. The results suggest that methylated As species in plants originated from the soil and As methylation in soil was influenced strongly by the soil conditions.
Tags
IRIS
•
Arsenic Hazard ID
PubMed
Considered New
PubMed
Considered New
2. Lit Search Updates through Oct 2015
PubMed
Considered
7. Other Studies through Oct 2015
Exposure Assessment
•
Arsenic (Inorganic)
1. Literature
Lit search updates through Oct 2015
3. Hazard ID Screening
Other potentially supporting studies
5. Susceptibility Screening
Excluded/Not relevant
•
Arsenic Susceptibility
1. Susceptibility Literature Screening
Keyword Search
2. Excluded
Not Relevant
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