Mechanism study of sulfur fertilization mediating copper translocation and biotransformation in rice (Oryza sativa L.) plants

文献类型： 外文期刊

第一作者： Sun, Lijuan

作者： Sun, Lijuan;Fang, Huaxiang;Xu, Chen;Peng, Cheng;Huang, Haomin;Shi, Jiyan;Sun, Lijuan;Fang, Huaxiang;Peng, Cheng;Lu, Lingli;Shi, Jiyan;Yang, Jianjun;Xu, Chen;Duan, Dechao;Huang, Haomin;Zhang, Xiangzhi

作者机构：

关键词： Copper (Cu);Rice (Oryza sativa L.);Sulfur fertilizer;Translocation;XANES

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Metabolism of sulfur (S) is suggested to be an important factor for the homeostasis and detoxification of Cu in plants. We investigated the effects of S fertilizers (S-0, Na2SO4) on Cu translocation and biotransformation in rice plants by using multiple synchrotron-based techniques. Fertilization of S increased the biomass and yield of rice plants, as well as the translocation factor of Cu from root to shoot and shoot to grain, resulting in enhanced Cu in grain. Sulfur K-edge X-ray near edge structure (XANES) analysis showed that fertilization of S increased the concentration of glutathione in different rice tissues, especially in rice stem and leaf. Copper K-edge XANES results indicated that a much higher proportion of Cu (I) species existed in rice grain than husk and leaf, which was further confirmed by soft X-ray scanning transmission microscopy results. Sulfur increased the proportion of Cu (I) species in rice grain, husk and leaf, suggesting the inducing of Cu (II) reduction in rice tissues by S fertilization. These results suggested that fertilization of S in paddy soils increased the accumulation of Cu in rice grain, possibly due to the reduction of Cu (II) to Cu (I) by enhancing glutathione synthesis and increasing the translocation of Cu from shoot to grain. (C) 2017 Elsevier Ltd. All rights reserved.

分类号： X5

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