Arsenic accumulation and speciation in rice grains influenced by arsenic phytotoxicity and rice genotypes grown in arsenic-elevated paddy soils
Journal
Journal of Hazardous Materials
Journal Volume
286
Pages
179-186
Date Issued
2015
Author(s)
Abstract
Rice consumption is a major route of As exposure to human for the population of worldwide. This study investigates the effect of phytotoxicity and rice genotypes on the content and speciation of As in rice grains grown in different levels of As-elevated paddy soils from Taiwan. Three levels of As-elevated soils and six rice genotypes commonly planted in Taiwan were used for this study. The results indicate that As contents in grains of rice is not proportional to soil As concentrations and they were equal or higher in indica genotypes than japonica genotypes used in this study. It was also found that the As phytotoxicity not only reducing the grain yields but also the As concentrations in grain of rice. The predominant As species found in rice grains were dimethylarsinic acid (DMA) and arsenite. The concentrations of DMA increased with total As concentrations, wherggeas the arsenite remained in a narrow range from 0.1 to 0.3mgkg-1. Because of the lower toxicity of DMA than inorganic As species, the health risks may not be increased through consumption of rice even when total As content in the grains is increased. ? 2014 Elsevier B.V.
Subjects
Arsenic; Arsenic species; Genotypes; Paddy soil; Phytotoxicity; Rice
SDGs
Other Subjects
Arsenic; Health risks; Soil pollution; Soils; Arsenic species; Genotypes; Paddy soils; Phytotoxicity; Rice; Grain (agricultural product); arsenic trioxide; cacodylic acid; arsenous acid derivative; cacodylic acid; soil pollutant; arsenic; bioaccumulation; genotype; paddy field; phytotoxicity; risk factor; speciation (chemistry); Article; controlled study; genotype; grain yield; health hazard; high performance liquid chromatography; mass spectrometry; nonhuman; paddy soil; phytotoxicity; plant growth; rice; soil; species differentiation; species distribution; Taiwan; agriculture; analysis; biomass; chemistry; drug effects; food contamination; genetics; growth, development and aging; metabolism; Oryza; soil pollutant; toxicity; Taiwan; Japonica; Agriculture; Arsenites; Biomass; Cacodylic Acid; Food Contamination; Genotype; Oryza; Soil Pollutants; Taiwan
Type
journal article