Arsenic biotransformation and volatilization in transgenic rice

Meng, Xiangyan; Qin, Jie; Wang, Lihong; Duan, Guilan; Sun, Guoxin; Wu, Huilan; Chu, Chengcai; Ling, Hong‐Qing; Rosen, Barry P.; Zhu, Yan

doi:10.1111/j.1469-8137.2011.03743.x

Cited by 115 publications

(50 citation statements)

References 30 publications

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“…the percentages of As(III) to the sum of As species (70.8-88.6 %) were much higher than that of As(V) (11.4-29.2 %) in rice shoots, suggesting As(III) was the predominant As species in rice shoot (Table 1). A similar trend was observed by Meng et al (2011), who reported that As(III) accounted for 90 % in the shoots in both transgenic and wild type rice treated with 10 μM As(III) for 4 weeks. In As(III)-treated plants, supplying Se(IV) significantly (P <0.05) increased the percentage of As(III) in roots (68.6 %), thereby decreased percentage of As(V) in roots, whereas no significant differences were found in other treatments (As(III)+Se(IV), As(V)+Se(IV), and As(V)+ Se(VI)) both in shoots and roots.…”

Section: Selenite Increased As Accumulation In Rice Rootsupporting

confidence: 66%

Interactive effects of different inorganic As and Se species on their uptake and translocation by rice (Oryza sativa L.) seedlings

Duan

Huang

et al. 2013

Environ Sci Pollut Res

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There is a lack of information on the interactive relationship of absorption and transformation between two inorganic arsenic (As) species and two inorganic selenium (Se) species in rice grown under hydroponic condition. Interactive effects of inorganic As (As(III)) and (As(V)) and Se (Se(IV)and Se(VI)) species on their uptake, accumulation, and translocation in rice (Oryza sativa L.) seedlings were investigated in hydroponic culture. The results clearly showed the interactive effects of inorganic As and Se on their uptake by rice. The presence of Se reduced the sum of As species in the rice shoots regardless of Se speciation. If Se is present as Se(IV), then is it is accompanied by a corresponding increase of the sum of As species, but if Se is present as Se(VI), then there is no change in the sum of As species in rice roots. These effects are observed regardless of initial As speciation. When the rice plants are exposed to Se(IV), the presence of As increases the sum of Se species in the roots, and decreases the sum of Se species in the corresponding shoots. This effect is more pronounced for As(III) than for As(V). There is no effect on Se during exposure to Se(VI). Co-existence of As also increased SeMet in rice roots.

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Section: Selenite Increased As Accumulation In Rice Rootsupporting

confidence: 66%

Interactive effects of different inorganic As and Se species on their uptake and translocation by rice (Oryza sativa L.) seedlings

Duan

Huang

et al. 2013

Environ Sci Pollut Res

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“…It is generally believed that plants cannot produce and volatilize TMAs as microorganisms do (Zhao et al, 2009). However, transgenic rice plants expressing the arsM gene from R. palustris induced As methylation and volatilization (Meng et al, 2011). This proved the concept of using genetic modification to develop efficient phytoremediation (phytovolatilization) methods for contaminated soils and water.…”

Section: Genetic Modification For Enhancing As Volatilizationmentioning

confidence: 99%

A review on completing arsenic biogeochemical cycle: Microbial volatilization of arsines in environment

Wang¹,

Sun²,

Jia³

et al. 2014

Journal of Environmental Sciences

137

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a b s t r a c t Arsenic (As) is ubiquitous in the environment in the carcinogenic inorganic forms, posing risks to human health in many parts of the world. Many microorganisms have evolved a series of mechanisms to cope with inorganic arsenic in their growth media such as transforming As compounds into volatile derivatives. Bio-volatilization of As has been suggested to play an important role in global As biogeochemical cycling, and can also be explored as a potential method for arsenic bioremediation. This review aims to provide an overview of the quality and quantity of As volatilization by fungi, bacteria, microalga and protozoans. Arsenic bio-volatilization is influenced by both biotic and abiotic factors that can be manipulated/elucidated for the purpose of As bioremediation. Since As biovolatilization is a resurgent topic for both biogeochemistry and environmental health, our review serves as a concept paper for future research directions.

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“…For the determination of As species, samples of grain and husk (0.2 g) were weighed into 50 ml tubes, with addition of 10 ml 1 % HNO 3 , kept for one night, and then digested using microwave digestion system (MARS, CEM Microwave Technology Ltd, USA) as described before (Meng et al 2011). The temperature was gently raised, first to 55°C and then to 75°C, holding for 10 min.…”

Section: Pot Experiments For Rice Harvestingmentioning

confidence: 99%

“…To determinate the total As concentrations in shoots, DCB extracted roots, husks and grains, frozen-dried milled subsamples (0.1-0.2 g) were weighed into 50 ml digestion tubes, followed by 2.5 ml of nitric acid. The mixtures were stood overnight at room temperature, and digested by microwave digestion system (Meng et al 2011). …”

Section: Pot Experiments For Rice Harvestingmentioning

confidence: 99%

Biogas slurry application elevated arsenic accumulation in rice plant through increased arsenic release and methylation in paddy soil

et al. 2012

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Background Rice can accumulate arsenic (As) to relatively high concentrations due to the general flooding practices in rice cultivation, and organic matter in the soil strongly affected As bioavailability to rice plants. The influence of organic matter input on the As transformation in paddy soil and As uptake into rice plants is an area that is rarely investigated. Methods Biogas slurry (BGS), a commonly used organic fertilizer, was applied to an As contaminated paddy soil, in order to investigate the influence of organic matter on As transformation in the paddy soil and As accumulation in rice plants.Results Application of BGS significantly increased the As accumulation in rice plants, especially for methylated As species. Results showed that the concentrations of dissolved organic carbon (DOC) and dissolved Fe(II) in the soil solution were significantly increased by the BGS addition into the paddy soil, and were significantly correlated to the As concentration in the soil solution (P<0.01). The increase of soil pH and the decrease of the soil redox potential (Eh) were observed as well. These alteration of soil characteristics elevated the As release from soil particles to the soil solution under the addition of BGS. The increased concentrations of dimethylarsinic acid (DMAs(V)) and monomethylarsonic acid (MMAs(V)) in the soil solution, and the volatilized As of trimethylarsine (TMAs) from the paddy soil, suggested that As methylation and volatilization in the soil were also enhanced by BGS addition. The concentrations of methylated As species in rice husks and grains were increased by 105.8-105.9 % and 99.7-112.2 %, respectively. Conclusion These results suggested that the use of organic fertilizer, such as BGS in As-contaminated paddy soil, can significantly alter the behavior of As in soil-rice system and enhance As accumulation in rice plants and should therefore be avoided.

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Arsenic biotransformation and volatilization in transgenic rice

Cited by 115 publications

References 30 publications

Interactive effects of different inorganic As and Se species on their uptake and translocation by rice (Oryza sativa L.) seedlings

Interactive effects of different inorganic As and Se species on their uptake and translocation by rice (Oryza sativa L.) seedlings

A review on completing arsenic biogeochemical cycle: Microbial volatilization of arsines in environment

Biogas slurry application elevated arsenic accumulation in rice plant through increased arsenic release and methylation in paddy soil

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