CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
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
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume51Issue:9Pages:5215-5221
Subtype期刊论文
AbstractUptake 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
Indexed BySCI
Language英语
WOS IDWOS:000400723200052
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/27498
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
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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