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Arsenic limits trace mineral nutrition (selenium, zinc, and nickel) in Bangladesh rice grain

Williams, Paul N and Islam, Shofiqul and Islam, Rafiqul and Jahiruddin, M and Adomako, Eureka and Soliaman, A R M and Rahman, G K M M and Lu, Ying and Deacon, Claire and Zhu, Yong-Guan and Meharg, Andrew A (2009) Arsenic limits trace mineral nutrition (selenium, zinc, and nickel) in Bangladesh rice grain. Environmental Science and Technology, 43 (21). pp. 8430-8436. ISSN 0013-936X

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Abstract

A reconnaissance of 23 paddy fields, from three Bangladesh districts, encompassing a total of 230 soil and rice plant samples was conducted to identify the extent to which trace element characteristics in soils and irrigation waters are reflected by the harvested rice crop. Field sites were located on two soil physiographic units with distinctly different As soil baseline and groundwater concentrations. For arsenic (As), both straw and grain trends closely fitted patterns observed for the soils and water. Grain concentration characteristics for selenium (Se), zinc (Zn), and nickel (Ni), however, were markedly different. Regressions of shoot and grain As against grain Se, Zn, and Ni were highly significant (P <0.001), exhibiting a pronounced decline in grain trace-nutrient quality with increasing As content. To validate this further, a pot experiment cultivar screening trial, involving commonly cultivated high yielding variety (HYV) rice grown alongside two U.S. rice varieties characterized as being As tolerant and susceptible, was conducted on an As-amended uniform soil. Findings from the trial confirmed that As perturbed grain metal(loid) balances, resulting in severe yield reductions in addition to constraining the levels of Se, Zn, and Ni in the grain.

Item Type: Article
Journal or Publication Title: Environmental Science and Technology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 53857
Deposited By: ep_importer_pure
Deposited On: 27 Apr 2012 16:50
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/53857

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