Root application of selenite can simultaneously reduce arsenic and cadmium accumulation and maintain grain yields, but show negative effects on the grain quality of paddy rice

文献类型： 外文期刊

第一作者： Liao, Guojian

作者： Liao, Guojian;Wu, Qianhua;Feng, Renwei;Guo, Junkang;Wang, Ruigang;Ding, Yongzhen;Sun, Yang;Xu, Yingming;Xia, Wei;Feng, Renwei;Guo, Junkang;Wang, Ruigang;Sun, Yang;Xu, Yingming;Liao, Guojian;Wu, Qianhua;Feng, Renwei;Fan, Zhilian;Mo, Liangyu;Chen, Cheng;Xu, Yi

作者机构：

关键词： Rice growth;Photosynthesis;Dry biomass;Grain production and quality;Remediation

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Most current technologies can hardly simultaneously reduce the accumulation of arsenic (As) and cadmium (Cd) in crops. In this study, root application of selenite [Se (IV)] and selenate [Se (VI)] was used to assess their abilities to reduce the accumulation of As and Cd, and maintain the yields and quality of rice grains. The results show that Se (IV) showed a weaker ability than Se (VI) to maintain the grain contents of many essential elements, but a stronger ability to decrease As and Cd contents in rice grains, and maintain the yields, photosynthesis rate and stomatal conductance, and increase the grain contents of several amino acids (AAs), total Se, selenomethionine (SeMet) and selenocysteine (SeCys). The best outcomes resulted at a relatively high application of 5 mg kg(-1) Se (IV), reflecting in the highest total Se, SeCys and SeMet content (14.95, 118.70 and 864.73 mu g kg(-1), respectively) in the grains, highest grain yield, and lowest grain As and Cd content (036 and 0.07 mg kg(-1), respectively). In addition, the application of 1-5 mg kg(-1) Se (IV) seemed to facilitate the formation of SeMet in the grains, but most inorganic Se in the grains were transformed into SeCys and SeMet under Se (VI) treatments. This study provides a new idea to resolve the problems of high accumulation of As and Cd in rice grains and insufficiency of Se intake in China. (C) 2016 Published by Elsevier Ltd.

分类号： X32

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