| 植物对纳米颗粒的吸收、转运及毒性效应 |
| 摘要点击 5689 全文点击 2399 投稿时间：2013-02-25 修订日期：2013-05-29 |
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| 中文关键词 纳米颗粒 植物 吸收 生物转运 植物毒性 |
| 英文关键词 engineered nanoparticles plant uptake biotranslocation phytotoxicity |
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| 中文摘要 |
| 随着工程纳米颗粒的广泛使用,这些纳米材料不可避免地进入环境,对环境造成未知影响. 植物是高等生物暴露于纳米颗粒的一条主要途径,工程纳米颗粒可能通过食物链使其在高营养水平生物中积累. 植物与纳米颗粒间的相互作用应该受到关注和重视. 已有的文献表明纳米颗粒能被植物选择性地吸收并引起植物毒性,但纳米颗粒进入植物体内的机制仍不明确. 多数关于植物吸收纳米颗粒的研究是在理想条件如水培实验下开展,并且集中在植物的种子发芽或是幼苗生长阶段. 描述纳米颗粒在植物体内的生物转化和在植物体内分配的报道较少,而且这方面的机制没有阐述清楚. 目前有许多研究者关注纳米颗粒的植物毒性效应,但这方面的研究需要进一步深入. |
| 英文摘要 |
| With the increasing use of engineered nanoparticles, these materials will inevitably be released into the environment with unknown consequences. The interactions between engineered nanoparticles and plants are of particular concern, and the uptake by plants may constitute one of the main routes of exposure for species at a higher trophic level, leading to possible biomagnification of nanoparticles in the food chain. A review of the current literature shows that nanoparticles can be taken up by plants and cause phytotoxicity. The mechanisms by which engineered nanoparticles penetrate plant cells are still not well understood. Most of the studies have been performed with a few plant species under non-natural conditions such as hydroponics, and have included only the germination or seedling growth stage. Nanoparticles may undergo biotransformation and subsequent translocation within plants, although the mechanisms are poorly understood. Phytotoxicity is an important aspect for assessing potential environmental impacts of nanoparticles, but the mode of toxicity remains to be investigated. |
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