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题名:
Xylem and Phloem Based Transport of CeO2 Nanoparticles in Hydroponic Cucumber Plants
作者: Ma, YH; He, X; Zhang, P; Zhang, ZY; Ding, YY; Zhang, JZ; Wang, GH; Xie, CJ; Luo, WH; Zhang, J; Zheng, LR; Chai, ZF; Yang, K
刊名: ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期: 2017
卷号: 51, 期号:9, 页码:5215-5221
DOI: 10.1021/acs.est.6b05998
文章类型: 期刊论文
英文摘要: Uptake and translocation of manufactured nanoparticles (NPs) in plants have drawn much attention due to their potential toxicity to the environment, including food webs. In this paper, the xylem and phloem based transport of CeO2 NPs in hydroponic cucumber plants was investigated using a split-root system. One half of the root system was treated with 200 or 2000 mg/L of CeO2 NPs for 3 days, whereas the other half remained untreated, with both halves sharing the same aerial part. The quantitative distribution and speciation of Ce in different plant tissues and xylem sap were analyzed by inductively coupled plasma-mass spectrometry, transmission electron microscope, X-ray absorption near edge structure, and X-ray fluorescence. Results show that about 15% of Ce was reduced from Ce(IV) to Ce(III) in the roots of the treated-side (TS), while almost all of Ce remained Ce(IV) in the blank-side (BS). The detection of CeO2 or its transformation products in the xylem sap, shoots, and BS roots indicates that Ce was transported as a mixture of Ce(IV) and Ce(III) from roots to shoots through xylem, while it was transported almost only in the form of CeO2 from shoots back to roots through phloem. To our knowledge, this is the first report of root-to-shoot-to-root redistribution after transformation of CeO2 NPs in plants, which has significant implications for food safety and human health.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000400723200052
ISSN号: 0013-936X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27498
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Ma, YH,He, X,Zhang, P,et al. Xylem and Phloem Based Transport of CeO2 Nanoparticles in Hydroponic Cucumber Plants[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017-01-01,51(9):5215-5221.
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文件名: Xylem and Phloem Based Transport of CeO2 Nanoparticles in Hydroponic Cucumber Plants.pdf
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