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Cited by 353

The DOI matches its Crossref record; 103 of the 103 references it cites were found in a registry or an index.

Methylated Arsenic Species in Rice: Geographical Variation, Origin, and Uptake Mechanisms

Zhao, Fang-Jie, Zhu, Yong-Guan, Meharg, Andrew A.·2013·Environmental Science & Technology

Abstract

Rice is a major source of inorganic arsenic (iAs) in the human diet because paddy rice is efficient at accumulating As. Rice As speciation is dominated by iAs and dimethylarsinic acid (DMA). Here we review the global pattern in rice As speciation and the factors causing the variation. Rice produced in Asia shows a strong linear relationship between iAs and total As concentration with a slope of 0.78. Rice produced in Europe and the United States shows a more variable, but generally hyperbolic relationship with DMA being predominant in U.S. rice. Although there is significant genotypic variation in grain As speciation, the regional variations are primarily attributed to environmental factors. Emerging evidence also indicates that methylated As species in rice are derived from the soil, while rice plants lack the As methylation ability. Soil flooding and additions of organic matter increase microbial methylation of As, although the microbial community responsible for methylation is poorly understood. Compared with iAs, methylated As species are taken up by rice roots less efficiently but are transported to the grain much more efficiently, which may be an important factor responsible for the spikelet sterility disorder (straight-head disease) in rice. DMA is a weak carcinogen, but the level of ingestion from rice consumption is much lower than that of concern. Questions that require further investigations are identified.

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Metadata

Authors
Zhao, F.-J., Zhu, Y.-G., & Meharg, A. A.
Venue
Environmental Science & Technology
Published
2013-04-10
Volume
47
Issue
9
Pages
3957-3966
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2334520605
Cited by
353
References
103
FWCI
13.53
Type
journal article
Language
en
Open access
closed

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