Arsenite transporters expression in rice (Oryza sativa L.) associated with arbuscular mycorrhizal fungi (AMF) colonization under different levels of arsenite stress

Chen, Xun Wen; Li, Hui; Chan, W. F.; Wu, Chuan; Wu, Fuyong; Wu, Shengchun; Wong, Ming Hung

doi:10.1016/j.chemosphere.2012.07.054

Cited by 72 publications

(22 citation statements)

References 33 publications

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“…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. As the predominant species in paddy soils (Pan et al, 2014), As(III) is a silicic acid analogue and is assimilated via silicic acid transporters Lsi 1 and Lsi 2 (Ma et al, 2008;Chen et al, 2012). Rice aquaporin Lsi 1 was also considered to mediate the uptake of DMA and MMA in rice plants (Li et al, 2009b), and therefore Si application may suppress As(III) uptake due to competition with Si for transport pathways especially Lsi 2 (Ma et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…In flooded soils, rice is inherently efficient at taking up and transferring As(III) (Su et al, 2010) due to the translocation of As (III) into rice via silicon transport systems (transporters Lis1 and Lsi 2) as a silicon acid analogue (Ma et al, 2006(Ma et al, ,2008Chen et al, 2012). Transporter Lis1 acts as a major uptake channel for As(III) in rice plants and Lsi 2 plays an essential role in mediating As(III) translocation to shoots and subsequent accumulation in the grains (Ma et al, 2006(Ma et al, , 2008.…”

Section: Introductionmentioning

confidence: 99%

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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%

Section: Introductionmentioning

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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“…In their research, Glomus mosseae showed the highest root colonization rate (17.4%-81.6%), followed by Glomus etunicatum (5.6%-44.3%) and Glomus constrictum (1.8%-16.8%). Anyway, AMF had a widely recognized role in helping plant to adapt to As contaminated soils, by reducing As(V) influx into excised plant roots (Gonzalez-Chavez et al, 2002), mitigating oxidative stress of the plant caused by the As contamination (Yu et al, 2009;Garg and Singla, 2012), and influencing the distribution and the speciation of As in plants (Yu et al, 2009;Chen et al, 2012;Zhang et al, 2015). In the Shimen Realgar mining area, there are potentially some As tolerant AMF strains after a long-term adaptation to As contamination, while those AMF strains could be ideal candidates for bioremediation of the contaminated environments.…”

Section: Discussionmentioning

confidence: 99%

The molecular diversity of arbuscular mycorrhizal fungi in the arsenic mining impacted sites in Hunan Province of China

Sun

Zhang

et al. 2016

Journal of Environmental Sciences

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Arbuscular mycorrhizal fungi (AMF) can establish a mutualistic association with most terrestrial plants even in heavy metal contaminated environments. It has been documented that high concentrations of toxic metals, such as arsenic (As) in soil could adversely affect the diversity and function of AMF. However, there are still gaps in understanding the community composition of AMF under long-term As contaminations. In the present study, six sampling sites with different As concentrations were selected in the Realgar mining area in Hunan Province of China. The AMF biodiversity in the rhizosphere soils of the dominant plant species was investigated by sequencing the nuclear small subunit ribosomal RNA (SSU rRNA) gene fragments using 454-pyrosequencing technique. A total of 11 AMF genera were identified, namely Rhizophagus, Glomus, Funneliformis, Acaulospora, Diversispora, Claroideoglomus, Scutellopora, Gigaspora, Ambispora, Praglomus, and Archaeospora, among which Glomus, Rhizophagus, and Claroideoglomus clarodeum were detected in all sampling sites, and Glomus was the dominant AMF genus in the Realgar mining area. Redundancy analysis indicated that soil pH, total As and Cd concentrations were the main factors influencing AMF community structure. There was a negative correlation between the AMF species richness and the total As concentration in the soil, but no significant correlation between the Shannon-Wiener index of the AMF and plants. Our study showed that high As concentrations can exert a selective effect on the AMF populations.

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“…Arbuscular mycorrhizal fungi (AMF) play a protective role in arsenic translocation that suppresses mRNA expression of OsLsi1 and OsLsi2, the mediators of As III transport [176]. Thus, AMF helps in biomass and grain yield without accelerating the accumulation of arsenic in grain under As stress [176,177], which might be an interesting approach to develop a cost-effective mitigation strategy [29].…”

Section: Role Of Soil Microorganismmentioning

confidence: 99%

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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Arsenite transporters expression in rice (Oryza sativa L.) associated with arbuscular mycorrhizal fungi (AMF) colonization under different levels of arsenite stress

Cited by 72 publications

References 33 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

The molecular diversity of arbuscular mycorrhizal fungi in the arsenic mining impacted sites in Hunan Province of China

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

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