Effects of As levels on radial oxygen loss and As speciation in rice

Chuan Wu; Hui Li; Zhihong Ye; Fuyong Wu; Ming Hung Wong

doi:10.1007/s11356-013-2083-1

Effects of As levels on radial oxygen loss and As speciation in rice

Chuan Wu, Hui Li, Zhihong Ye, Fuyong Wu^*, Ming Hung Wong

^*Corresponding author for this work

Department of Biology

Research output: Contribution to journal › Journal article › peer-review

19 Citations (Scopus)

Abstract

Greenhouse experiment was conducted to examine effects of arsenic (As) on iron plaque formation, radial oxygen loss, As accumulation, and speciation in rice. Three genotypes were grown in soil with three different concentrations of As. The stress of As caused a slight increase of iron plaque formation (P > 0.05) and a decrease in the rates of radial oxygen loss (ROL; P < 0.01). The results of As speciation showed that the percentages of DMA increased from 19-28 % to 53-58 %, while the percentages of inorganic As decreased from 53-58 % to 36-42 % with the increasing soil As concentrations, indicating a strong environmental influence on As species in rice grain. The present study showed that elevated soil As may induce As toxicity towards rice plants, leading to the decrease of ROL; environmental factors could influence As methylation or As species transportation. Our study provided useful information on As tolerance and accumulation in rice which may contribute to reducing the health risk posed by As contamination in rice.

Original language	English
Pages (from-to)	8334-8341
Number of pages	8
Journal	Environmental Science and Pollution Research
Volume	20
Issue number	12
DOIs	https://doi.org/10.1007/s11356-013-2083-1
Publication status	Published - Dec 2013

User-Defined Keywords

Arsenic
Radial oxygen loss
Rice
Speciation

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10.1007/s11356-013-2083-1

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title = "Effects of As levels on radial oxygen loss and As speciation in rice",

abstract = "Greenhouse experiment was conducted to examine effects of arsenic (As) on iron plaque formation, radial oxygen loss, As accumulation, and speciation in rice. Three genotypes were grown in soil with three different concentrations of As. The stress of As caused a slight increase of iron plaque formation (P > 0.05) and a decrease in the rates of radial oxygen loss (ROL; P < 0.01). The results of As speciation showed that the percentages of DMA increased from 19-28 % to 53-58 %, while the percentages of inorganic As decreased from 53-58 % to 36-42 % with the increasing soil As concentrations, indicating a strong environmental influence on As species in rice grain. The present study showed that elevated soil As may induce As toxicity towards rice plants, leading to the decrease of ROL; environmental factors could influence As methylation or As species transportation. Our study provided useful information on As tolerance and accumulation in rice which may contribute to reducing the health risk posed by As contamination in rice.",

keywords = "Arsenic, Radial oxygen loss, Rice, Speciation",

author = "Chuan Wu and Hui Li and Zhihong Ye and Fuyong Wu and Wong, {Ming Hung}",

note = "Funding Information: Acknowledgments We sincerely thank Dr. Haitao Zhu (South China Agriculture University) and Guangdong Rice Research Institute, Guangzhou, Peoples Republic of China, for providing the rice seeds. Financial support from Research Grants Council of Hong Kong [HKBU261407 and HKBU262009] and National Natural Science Foundation of China (no. 30770417) is gratefully acknowledged.",

year = "2013",

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doi = "10.1007/s11356-013-2083-1",

language = "English",

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TY - JOUR

T1 - Effects of As levels on radial oxygen loss and As speciation in rice

AU - Wu, Chuan

AU - Li, Hui

AU - Ye, Zhihong

AU - Wu, Fuyong

AU - Wong, Ming Hung

N1 - Funding Information: Acknowledgments We sincerely thank Dr. Haitao Zhu (South China Agriculture University) and Guangdong Rice Research Institute, Guangzhou, Peoples Republic of China, for providing the rice seeds. Financial support from Research Grants Council of Hong Kong [HKBU261407 and HKBU262009] and National Natural Science Foundation of China (no. 30770417) is gratefully acknowledged.

PY - 2013/12

Y1 - 2013/12

N2 - Greenhouse experiment was conducted to examine effects of arsenic (As) on iron plaque formation, radial oxygen loss, As accumulation, and speciation in rice. Three genotypes were grown in soil with three different concentrations of As. The stress of As caused a slight increase of iron plaque formation (P > 0.05) and a decrease in the rates of radial oxygen loss (ROL; P < 0.01). The results of As speciation showed that the percentages of DMA increased from 19-28 % to 53-58 %, while the percentages of inorganic As decreased from 53-58 % to 36-42 % with the increasing soil As concentrations, indicating a strong environmental influence on As species in rice grain. The present study showed that elevated soil As may induce As toxicity towards rice plants, leading to the decrease of ROL; environmental factors could influence As methylation or As species transportation. Our study provided useful information on As tolerance and accumulation in rice which may contribute to reducing the health risk posed by As contamination in rice.

AB - Greenhouse experiment was conducted to examine effects of arsenic (As) on iron plaque formation, radial oxygen loss, As accumulation, and speciation in rice. Three genotypes were grown in soil with three different concentrations of As. The stress of As caused a slight increase of iron plaque formation (P > 0.05) and a decrease in the rates of radial oxygen loss (ROL; P < 0.01). The results of As speciation showed that the percentages of DMA increased from 19-28 % to 53-58 %, while the percentages of inorganic As decreased from 53-58 % to 36-42 % with the increasing soil As concentrations, indicating a strong environmental influence on As species in rice grain. The present study showed that elevated soil As may induce As toxicity towards rice plants, leading to the decrease of ROL; environmental factors could influence As methylation or As species transportation. Our study provided useful information on As tolerance and accumulation in rice which may contribute to reducing the health risk posed by As contamination in rice.

KW - Arsenic

KW - Radial oxygen loss

KW - Rice

KW - Speciation

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DO - 10.1007/s11356-013-2083-1

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AN - SCOPUS:84891091551

SN - 0944-1344

VL - 20

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JO - Environmental Science and Pollution Research

JF - Environmental Science and Pollution Research

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ER -

Effects of As levels on radial oxygen loss and As speciation in rice

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