Arsenic accumulation and speciation in rice grains influenced by arsenic phytotoxicity and rice genotypes grown in arsenic-elevated paddy soils

Syu, Chien-Hui; Huang, Chien-Hua; Jiang, Pei-Yu; Lee, Chia-Hsing; Lee, Dar‐Yuan

doi:10.1016/j.jhazmat.2014.12.052

Cited by 76 publications

(29 citation statements)

References 48 publications

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“…Additionally, differences in translocation efficiency of both iAs and DMA between the two genotypes also confirmed this assumption. Numerous studies have reported that DMA is the dominant As species in grain (Smith et al,2008;Zheng et al, 2013;Syu et al, 2015). Zheng et al (2013) showed that DMA has greater mobility than inorganic As in both xylem and phloem, and DMA was inclined to accumulate in the caryopsis whilst inorganic As was mainly sequestered in vegetative tissues; Carey et al (2011) reported that DMA was easily transported into rice grain.…”

Section: Discussionmentioning

confidence: 99%

Effect of silicate on arsenic fractionation in soils and its accumulation in rice plants

Xue

et al. 2016

Chemosphere

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Four rice genotypes, two hybrid and two indica, were selected to investigate the effects of silicate (Si) application on arsenic (As) accumulation and speciation in rice and As fractionation in soil. There were significant differences in root, straw and grain biomass between genotypes (p<0.05), and Si application significantly increased root (p<0.05) and grain biomass (p<0.001). Silicate addition reduced the proportion of As associated with well-crystallized hydrous oxides of Fe and Al and residual phases, whilst increasing the proportions of specifically-sorbed As and As associated with amorphous and poorly-crystalline Fe and Al hydrous oxides. Furthermore, the results indicated that the fraction proportions of non-specifically sorbed, specifically-sorbed, and associated with amorphous and poorly-crystalline hydrous oxides of Fe and Al in rhizosphere soils, were greater than non-rhizosphere soils. Silicate application had a significant effect decreasing total As concentrations in root (p<0.005), straw (p<0.05) and husk (p<0.001) of rice plants. The effect of Si on reducing As accumulation in rice leaves was revealed by SXRF. Indica genotypes transported and accumulated less As than hybrid genotypes. Both percentage and concentration of iAs were lower in indica genotype XFY-9 than in hybrid genotype XWX-12. Silicate reduced iAs and DMA by 21% and 58% respectively in polished grain. DMA may have a greater translocation capacity from straw to polished grain than inorganic As. The study provides the potential for understanding As uptake mechanisms in rice and mitigating the health risks posed by As contamination in paddy fields.

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Section: Discussionmentioning

confidence: 99%

Effect of silicate on arsenic fractionation in soils and its accumulation in rice plants

Xue

et al. 2016

Chemosphere

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“…Arsenic concentration in rice grains vary to 6 and 7 folds in different countries, while this concentration varies up to 40-folds in rice varieties within same country. The findings help in hypothesizing that both the genotypes and environmental factors play very important roles to control arsenic accumulation in rice grains [65]. The major factors that influence the arsenic accumulation in rice grain include the type of the rice cultivar, plant physiology, the place where the plant was cultivated, and the method of processing of rice [10].…”

Section: Accumulation Of Arsenic In Rice Grainmentioning

confidence: 94%

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Mitra¹,

et al. 2017

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According to recent reports, millions of people across the globe are suffering from arsenic (As) toxicity. Arsenic is present in different oxidative states in the environment and enters in the food chain through soil and water. In the agricultural field, irrigation with arsenic contaminated water, that is, having a higher level of arsenic contamination on the top soil, which may affects the quality of crop production. The major crop like rice (Oryza sativa L.) requires a considerable amount of water to complete its lifecycle. Rice plants potentially accumulate arsenic, particularly inorganic arsenic (iAs) from the field, in different body parts including grains. Different transporters have been reported in assisting the accumulation of arsenic in plant cells; for example, arsenate (As V ) is absorbed with the help of phosphate transporters, and arsenite (As III ) through nodulin 26-like intrinsic protein (NIP) by the silicon transport pathway and plasma membrane intrinsic protein aquaporins. Researchers and practitioners are trying their level best to mitigate the problem of As contamination in rice. However, the solution strategies vary considerably with various factors, such as cultural practices, soil, water, and environmental/economic conditions, etc. The contemporary work on rice to explain arsenic uptake, transport, and metabolism processes at rhizosphere, may help to formulate better plans. Common agronomical practices like rain water harvesting for crop irrigation, use of natural components that help in arsenic methylation, and biotechnological approaches may explore how to reduce arsenic uptake by food crops. This review will encompass the research advances and practical agronomic strategies on arsenic contamination in rice crop.

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“…Conversely, the percentage of As(III) was inversely proportional to tAs (negative correlation, r = À0.361, p < 0.05). Reduction of As(III) in proportion with increased tAs may be because of restricted accumulation and translocation of As(III) in rice grains, while tAs concentration increases (Syu, Huang, Jiang, Lee, & Lee, 2015).…”

Section: Arsenic Speciation In Ricementioning

confidence: 99%

Arsenic speciation and heavy metal distribution in polished rice grown in Guangdong Province, Southern China

Wang

Tang

et al. 2017

Food Chemistry

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Arsenic accumulation and speciation in rice grains influenced by arsenic phytotoxicity and rice genotypes grown in arsenic-elevated paddy soils

Cited by 76 publications

References 48 publications

Effect of silicate on arsenic fractionation in soils and its accumulation in rice plants

Effect of silicate on arsenic fractionation in soils and its accumulation in rice plants

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Arsenic speciation and heavy metal distribution in polished rice grown in Guangdong Province, Southern China

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