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    • Nitrogen and nitrogen isotope data for wheat and barley exposed to CeO2 nanoparticles

    Metadata Updated: November 12, 2020

    The effects of cerium oxide nanoparticles (CeO2-NPs) on 15N/14N ratio (δ15N) in wheat and barley were investigated. Seedlings were exposed to 0 and 500 mg CeO2-NPs/L (Ce-0 and Ce-500, respectively) in hydroponic suspension supplied with NH4NO3, NH4+, or NO3-. N uptake and δ15N discrimination (i.e. differences in δ15N of plant and δ15N of N source) were measured. Results showed that N content and 15N abundance decreased in wheat but increased in barley. Ce-500 only induced whole-plant δ15N discrimination (-1.48‰, P ≤ 0.10) with a simultaneous decrease (P ≤ 0.05) in whole-plant δ15N (-3.24‰) compared to Ce-0 (-2.74‰) in wheat in NH4+. Ce-500 decreased (P ≤ 0.01) root δ15N of wheat in NH4NO3 and NH4+ (3.23 and -2.25‰, respectively) compared to Ce-0 (4.96 and -1.27‰, respectively), but increased (P ≤ 0.05) root δ15N of wheat in NO3- (3.27‰) compared to Ce-0 (2.60‰). Synchrotron micro-XRF revealed the presence of CeO2-NPs in shoots of wheat and barley regardless of N source. Although the longer-term consequences of CeO2-NP exposure on N uptake and metabolism are unknown, the results clearly show the potential for ENMs to interfere with plant metabolism of critical plant nutrients such as N even when toxicity is not observed.

    This dataset is associated with the following publication: Rico, C.M., M. Johnson, M.A. Marcus, and C.P. Andersen. Shifts in N and δ15N in wheat and barley exposed to cerium oxide nanoparticles. NanoImpact. Elsevier B.V., Amsterdam, NETHERLANDS, 11: 156-163, (2018).

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

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    References

    https://doi.org/10.1016/j.impact.2018.08.003

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020

    Metadata Source

    Harvested from EPA ScienceHub

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Publisher U.S. EPA Office of Research and Development (ORD)
    Maintainer
    Identifier https://doi.org/10.23719/1411219
    Data Last Modified 2018-03-15
    Public Access Level public
    Bureau Code 020:00
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Harvest Object Id 55f6b776-f6b0-4066-8329-32b945359ad3
    Harvest Source Id 04b59eaf-ae53-4066-93db-80f2ed0df446
    Harvest Source Title EPA ScienceHub
    License https://pasteur.epa.gov/license/sciencehub-license.html
    Program Code 020:095
    Publisher Hierarchy U.S. Government > U.S. Environmental Protection Agency > U.S. EPA Office of Research and Development (ORD)
    Related Documents https://doi.org/10.1016/j.impact.2018.08.003
    Source Datajson Identifier True
    Source Hash c26d991080fc9e7910773fc5ceb5c0a85b2d4e58
    Source Schema Version 1.1

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