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The availabilities of arsenic and cadmium in rice paddy fields from a mining area: The role of soil extractable and plant silicon.
Environ Pollut. 2016 Aug; 215:258-265.EP

Abstract

Adequate silicon (Si) can greatly boost rice yield and improve grain quality through alleviating stresses associated with heavy metals and metalloids such as arsenic (As) and cadmium (Cd). The soil plant-available Si is relatively low in South China due to severe desilicification and allitization of the soils in this region. Conversely, pollution of heavy metals and metalloids in the soils of this region occurs widely, especially As and Cd pollution in paddy soil. Therefore, evaluating the plant availability of Si in paddy soil of South China and examining its correlation with the availability of heavy metals and metalloids are of great significance. Accordingly, in our study, 107 pairs of soil and rice plant samples were collected from paddy fields contaminated by As and Cd in South China. Significantly positive correlations between Si in rice plants and Si fractions in soils extracted with citric acid, NaOAc-HOAc buffer, and oxalate-ammonium oxalate buffer suggest that these extractants are more suitable for use in extracting plant-available Si in the soils of our present study. Significantly negative correlations between different Si fractions and As or Cd in rice plant tissues and negative exponential correlations between the molar ratios of Si to As/Cd in rice roots, straws, husks or grains and As/Cd in rice grains indicate that Si can significantly alleviate the accumulation of As/Cd from soils to the rice plants. Finally, a contribution assessment of soil properties to As/Cd accumulation in rice grains based on random forest showed that in addition to Si concentrations in soil or rice plants, other factors such as Fe fractions and total phosphorus also contributed largely to As/Cd accumulation in rice grains. Overall, Si exhibited its unique role in mitigating As or Cd stress in rice, and our study results provide strong field evidence for this role.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China.

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China; College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, China.

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China. Electronic address: cefbli@soil.gd.cn.

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China.

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China.

College of Life Sciences, South China Agricultural University, Guangzhou 510642, China.

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China.

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China.

Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China.

MeSH

ArsenicCadmiumChinaMiningOryzaPlant RootsSiliconSoil Pollutants

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27209244

Citation

Yu, Huan-Yun, et al. "The Availabilities of Arsenic and Cadmium in Rice Paddy Fields From a Mining Area: the Role of Soil Extractable and Plant Silicon." Environmental Pollution (Barking, Essex : 1987), vol. 215, 2016, pp. 258-265.

Yu HY, Ding X, Li F, et al. The availabilities of arsenic and cadmium in rice paddy fields from a mining area: The role of soil extractable and plant silicon. Environ Pollut. 2016;215:258-265.

Yu, H. Y., Ding, X., Li, F., Wang, X., Zhang, S., Yi, J., Liu, C., Xu, X., & Wang, Q. (2016). The availabilities of arsenic and cadmium in rice paddy fields from a mining area: The role of soil extractable and plant silicon. Environmental Pollution (Barking, Essex : 1987), 215, 258-265. https://doi.org/10.1016/j.envpol.2016.04.008

Yu HY, et al. The Availabilities of Arsenic and Cadmium in Rice Paddy Fields From a Mining Area: the Role of Soil Extractable and Plant Silicon. Environ Pollut. 2016;215:258-265. PubMed PMID: 27209244.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - The availabilities of arsenic and cadmium in rice paddy fields from a mining area: The role of soil extractable and plant silicon. AU - Yu,Huan-Yun, AU - Ding,Xiaodong, AU - Li,Fangbai, AU - Wang,Xiangqin, AU - Zhang,Shirong, AU - Yi,Jicai, AU - Liu,Chuanping, AU - Xu,Xianghua, AU - Wang,Qi, Y1 - 2016/05/19/ PY - 2016/01/26/received PY - 2016/04/01/revised PY - 2016/04/01/accepted PY - 2016/5/23/entrez PY - 2016/5/23/pubmed PY - 2017/1/24/medline KW - Arsenic KW - Cadmium KW - Paddy soil KW - Rice plants KW - Silicon fractions SP - 258 EP - 265 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 215 N2 - Adequate silicon (Si) can greatly boost rice yield and improve grain quality through alleviating stresses associated with heavy metals and metalloids such as arsenic (As) and cadmium (Cd). The soil plant-available Si is relatively low in South China due to severe desilicification and allitization of the soils in this region. Conversely, pollution of heavy metals and metalloids in the soils of this region occurs widely, especially As and Cd pollution in paddy soil. Therefore, evaluating the plant availability of Si in paddy soil of South China and examining its correlation with the availability of heavy metals and metalloids are of great significance. Accordingly, in our study, 107 pairs of soil and rice plant samples were collected from paddy fields contaminated by As and Cd in South China. Significantly positive correlations between Si in rice plants and Si fractions in soils extracted with citric acid, NaOAc-HOAc buffer, and oxalate-ammonium oxalate buffer suggest that these extractants are more suitable for use in extracting plant-available Si in the soils of our present study. Significantly negative correlations between different Si fractions and As or Cd in rice plant tissues and negative exponential correlations between the molar ratios of Si to As/Cd in rice roots, straws, husks or grains and As/Cd in rice grains indicate that Si can significantly alleviate the accumulation of As/Cd from soils to the rice plants. Finally, a contribution assessment of soil properties to As/Cd accumulation in rice grains based on random forest showed that in addition to Si concentrations in soil or rice plants, other factors such as Fe fractions and total phosphorus also contributed largely to As/Cd accumulation in rice grains. Overall, Si exhibited its unique role in mitigating As or Cd stress in rice, and our study results provide strong field evidence for this role. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/27209244/The_availabilities_of_arsenic_and_cadmium_in_rice_paddy_fields_from_a_mining_area:_The_role_of_soil_extractable_and_plant_silicon_ DB - PRIME DP - Unbound Medicine ER -