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植物砷吸收与代谢的研究进展

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刘文菊, 赵方杰. 植物砷吸收与代谢的研究进展[J]. 环境化学, 2011, 30(1): 56-62.
引用本文: 刘文菊, 赵方杰. 植物砷吸收与代谢的研究进展[J]. 环境化学, 2011, 30(1): 56-62.
shu
LIU Wenju, ZHAO Fangjie. A BRIEF REVIEW OF ARSENIC UPTAKE AND METABOLISM IN PLANTS[J]. Environmental Chemistry, 2011, 30(1): 56-62.
Citation: LIU Wenju, ZHAO Fangjie. A BRIEF REVIEW OF ARSENIC UPTAKE AND METABOLISM IN PLANTS[J]. Environmental Chemistry, 2011, 30(1): 56-62.
shu

植物砷吸收与代谢的研究进展

  • 1.

    河北农业大学资源与环境学院, 保定, 071000;

  • 2.

    Rothamsted Research, Harpenden, AL5 2JQ, U.K.

  • 基金项目:

    国家自然科学基金项目(40673060,41073074)资助.

A BRIEF REVIEW OF ARSENIC UPTAKE AND METABOLISM IN PLANTS

  • 1.

    College of Natural Resources and Environment, Hebei Agricultural University, Baoding, 071000, China;

  • 2.

    Rothamsted Research, Harpenden, AL5 2JQ, United Kingdom

  • Fund Project:

  • 摘要: 砷(As)作为一种植物非必需的类金属元素广泛存在于自然界中,砷过量摄入不仅会对植物生长产生毒害作用,而且在植物的可食部位累积并通过食物链对人体健康构成威胁.生长介质中的砷酸盐(五价砷)一般是通过磷酸盐转运蛋白被植物吸收的,而亚砷酸(三价砷)和没有解离的甲基化砷则主要是通过质膜上的水通道蛋白被植物吸收的.在植物体内五价砷很容易被还原为三价砷,三价砷和带巯基的植物络合素(PCs)结合形成络合物储存在液泡中,从而使植物达到解毒的目的.植物能否将无机砷甲基化仍待证实.本文综述了近年来植物对砷的吸收及其在植物体内存在行为的相关研究.
    Abstract: Arsenic is widely distributed in the environment; it is a nonessential element to plants. Excessive accumulation of arsenic can cause phytotoxicity and pose a potential health risk to humans through consumption of high-As food crops. Arsenate is taken up by plant roots via phosphate transporters, and arsenite and undissociated methylated As species (MMA and DMA) through the nodulin 26-like intrinsic protein (NIP) aquaporin channels and by a silicon efflux carrier. Arsenate is readily reduced to arsenite in planta, which is complexed with thiol-rich peptides such as phytochelatins (PCs) or effluxed to the external medium as arsenite. Arsenic is detoxified by complexation of arsenite with PCs and subsequent storage in the vacuoles. Whether plants can methylate inorganic arsenic remains to be confirmed. Recent progress in the understanding of the mechanisms of arsenic uptake and metabolism in plants is reviewed in this article.
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  • 收稿日期:  2010-09-01
刘文菊, 赵方杰. 植物砷吸收与代谢的研究进展[J]. 环境化学, 2011, 30(1): 56-62.
引用本文: 刘文菊, 赵方杰. 植物砷吸收与代谢的研究进展[J]. 环境化学, 2011, 30(1): 56-62.
shu
LIU Wenju, ZHAO Fangjie. A BRIEF REVIEW OF ARSENIC UPTAKE AND METABOLISM IN PLANTS[J]. Environmental Chemistry, 2011, 30(1): 56-62.
Citation: LIU Wenju, ZHAO Fangjie. A BRIEF REVIEW OF ARSENIC UPTAKE AND METABOLISM IN PLANTS[J]. Environmental Chemistry, 2011, 30(1): 56-62.
shu

植物砷吸收与代谢的研究进展

  • 1.  河北农业大学资源与环境学院, 保定, 071000;
  • 2.  Rothamsted Research, Harpenden, AL5 2JQ, U.K.
  • 收稿日期:  2010-09-01
基金项目:

国家自然科学基金项目(40673060,41073074)资助.

摘要: 砷(As)作为一种植物非必需的类金属元素广泛存在于自然界中,砷过量摄入不仅会对植物生长产生毒害作用,而且在植物的可食部位累积并通过食物链对人体健康构成威胁.生长介质中的砷酸盐(五价砷)一般是通过磷酸盐转运蛋白被植物吸收的,而亚砷酸(三价砷)和没有解离的甲基化砷则主要是通过质膜上的水通道蛋白被植物吸收的.在植物体内五价砷很容易被还原为三价砷,三价砷和带巯基的植物络合素(PCs)结合形成络合物储存在液泡中,从而使植物达到解毒的目的.植物能否将无机砷甲基化仍待证实.本文综述了近年来植物对砷的吸收及其在植物体内存在行为的相关研究.

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