Xylem and Phloem Based Transport of CeO2 Nanoparticles in Hydroponic Cucumber Plants
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
2017
发表期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
卷号51期号:9页码:5215-5221
文章类型期刊论文
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.
DOI10.1021/acs.est.6b05998
收录类别SCI
语种英语
WOS记录号WOS:000400723200052
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27498
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
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Ma, YH,He, X,Zhang, P,et al. Xylem and Phloem Based Transport of CeO2 Nanoparticles in Hydroponic Cucumber Plants[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017,51(9):5215-5221.
APA Ma, YH.,He, X.,Zhang, P.,Zhang, ZY.,Ding, YY.,...&Yang, K.(2017).Xylem and Phloem Based Transport of CeO2 Nanoparticles in Hydroponic Cucumber Plants.ENVIRONMENTAL SCIENCE & TECHNOLOGY,51(9),5215-5221.
MLA Ma, YH,et al."Xylem and Phloem Based Transport of CeO2 Nanoparticles in Hydroponic Cucumber Plants".ENVIRONMENTAL SCIENCE & TECHNOLOGY 51.9(2017):5215-5221.
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