Effect of Silicon on Arsenic Concentration and Speciation in Different Rice Tissues

LI Gang; ZHENG Maozhong; TANG Jianfeng; SHIM Hojae; CAI Chao

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Effect of Silicon on Arsenic Concentration and Speciation in Different Rice Tissues

机译：硅对不同水稻组织中砷浓度和形态的影响

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Rice is a major source of inorganic arsenic (As) exposure for billions of people worldwide.Therefore,strategies to reduce As accumulation in rice should be adopted.Silicon (Si) application can effectively mitigate As accumulation in rice.In this study,a pot experiment was performed to investigate the effect of Si on As speciation and distribution in different rice tissues.The results showed that Si addition significantly increased As and Si concentrations in soil solution and Si concentration in iron plaque formed around rice root surface,whereas As in the iron plaque was significantly decreased.Total As concentrations in the stem,leaf,husk,and brown rice were remarkably decreased by 51.9％,31.9％,33.8％,and 24.1％,respectively,after Si addition,and inorganic As concentrations were reduced by 52.3％,35.5％,50.1％,and 20.1％,respectively.Moreover,both dimethylarsinic acid concentration and percentage in rice grain were significantly elevated by Si application.Therefore,Si application is promising as a way to mitigate inorganic As accumulation in rice and to reduce consumer health risk.

机译：水稻是全世界数十亿人口无机砷暴露的主要来源。因此，应采取减少水稻中As积累的策略。施用硅（Si）可以有效减轻水稻中As的积累。通过实验研究了硅对不同水稻组织中砷形态和分布的影响。结果表明，硅的添加显着增加了土壤溶液中As和Si的浓度以及水稻根部表面形成的铁斑中Si的浓度，添加硅后，茎，叶，果壳和糙米中总砷的含量分别显着降低了51.9％，31.9％，33.8％和24.1％。硅的施用分别显着提高了水稻籽粒中二甲基亚砷酸的含量和百分比，分别为52.3％，35.5％，50.1％和20.1％。 ng作为减轻水稻中无机As积累并降低消费者健康风险的一种方法。

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《土壤圈（英文版）》 |2018年第3期|511-520|共10页
作者
LI Gang; ZHENG Maozhong; TANG Jianfeng; SHIM Hojae; CAI Chao;
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作者单位

Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021(China);

Ningbo Urban Environment Observatory and Monitoring Station, Ningbo 315830(China);

Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021(China);

College of Ecology and Resource Engineering, Wuyi University, Wuyishan 354300(China);

Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021(China);

Ningbo Urban Environment Observatory and Monitoring Station, Ningbo 315830(China);

University of Macau, Taipa, Macau SAR(China);

Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021(China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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正文语种 eng
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Effect of Silicon on Arsenic Concentration and Speciation in Different Rice Tissues

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