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Phytotoxicity of Graphene Family Nanomaterials and Its Mechanisms: A Review

文献类型： 外文期刊

作者： Wang, Qinghai 1 ; Li, Cui 1 ; Wang, Yu 2 ; Que, Xiaoe 3 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Res & Dev Ctr Grass & Environm, Beijing, Peoples R China

2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing, Peoples R China

3.Chinese Acad Forestry, Inst Desertificat Studies, Beijing, Peoples R China

关键词： nanomaterials; plant; phytotoxicity; influencing factor; toxicity mechanisms

期刊名称：FRONTIERS IN CHEMISTRY （ 影响因子：5.221； 五年影响因子：5.385 ）

ISSN： 2296-2646

年卷期： 2019 年 7 卷

页码：

收录情况： SCI

摘要： Graphene family nanomaterials (GFNs) have experienced significant development in recent years and have been used in many fields. Despite the benefits, they bring to society and the economy, their potential for posing environmental and health risks should also be considered. The increasing release of GFNs into the ecosystem is one of the key environmental problems that humanity is facing. Although most of these nanoparticles are present at low concentrations, many of them raise considerable toxicological concerns, particularly regarding their accumulation in plants and the consequent toxicity introduced at the bottom of the food chain. Here, we review the recent progress in the study of toxicity caused by GFNs to plants, as well as its influencing factors. The phytotoxicity of GFNs is mainly manifested as a delay in seed germination and a severe loss of morphology of the plant seedling. The potential mechanisms of phytotoxicity were summarized. Key mechanisms include physical effects (shading effect, mechanical injury, and physical blockage) and physiological and biochemical effects (enhancement of reactive oxygen species (ROS), generation and inhibition of antioxidant enzyme activities, metabolic disturbances, and inhibition of photosynthesis by reducing the biosynthesis of chlorophyll). In the future, it is necessary to establish a widely accepted phytotoxicity evaluation system for safe manufacture and use of GFNs.

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