{"accessLevel": "public", "bureauCode": ["020:00"], "contactPoint": {"fn": "Christian Andersen", "hasEmail": "mailto:andersen.christian@epa.gov"}, "description": "The effects of cerium oxide nanoparticles (CeO2-NPs) on 15N/14N ratio (\u03b415N) 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 \u03b415N discrimination (i.e. differences in \u03b415N of plant and \u03b415N 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 \u03b415N discrimination (-1.48\u2030, P \u2264 0.10) with a simultaneous decrease (P \u2264 0.05) in whole-plant \u03b415N (-3.24\u2030) compared to Ce-0 (-2.74\u2030) in wheat in NH4+.  Ce-500 decreased (P \u2264 0.01) root \u03b415N of wheat in NH4NO3 and NH4+ (3.23 and -2.25\u2030, respectively) compared to Ce-0 (4.96 and -1.27\u2030, respectively), but increased (P \u2264 0.05) root \u03b415N of wheat in NO3- (3.27\u2030) compared to Ce-0 (2.60\u2030).  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. \n\nThis dataset is associated with the following publication:\nRico, C.M., M. Johnson, M.A. Marcus, and C.P. Andersen. Shifts in N and \u03b415N in wheat and barley exposed to cerium oxide nanoparticles.   NanoImpact. Elsevier B.V., Amsterdam,  NETHERLANDS, 11: 156-163, (2018).", "distribution": [{"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NH%20barley%20Isotope%20-%20data%20repository%20for%20Chris.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "hydroponics NH barley Isotope - data repository for Chris.xlsx"}, {"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NH%20wheat%20Isotope%20-%20data%20repository%20for%20Chris.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "hydroponics NH wheat Isotope - data repository for Chris.xlsx"}, {"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NHNO%20barley%20Isotope%20-%20data%20repository%20for%20Chris.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "hydroponics NHNO barley Isotope - data repository for Chris.xlsx"}, {"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NHNO%20wheat%20Isotope%20-%20data%20repository%20for%20Chris.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "hydroponics NHNO wheat Isotope - data repository for Chris.xlsx"}, {"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NO%20barley%20Isotope%20-%20data%20repository%20for%20Chris.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "hydroponics NO barley Isotope - data repository for Chris.xlsx"}, {"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NO%20wheat%20Isotope%20-%20data%20repository%20for%20Chris.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "hydroponics NO wheat Isotope - data repository for Chris.xlsx"}], "identifier": "https://doi.org/10.23719/1411219", "keyword": ["Synchrotron micro XRF", "ammonium nitrate", "engineered nanomaterials (ENMs)", "intergenerational effects", "isotope", "isotopic discrimination", "nitrogen"], "license": "https://pasteur.epa.gov/license/sciencehub-license.html", "modified": "2018-03-15", "programCode": ["020:095"], "publisher": {"name": "U.S. EPA Office of Research and Development (ORD)", "subOrganizationOf": {"name": "U.S. Environmental Protection Agency", "subOrganizationOf": {"name": "U.S. Government"}}}, "references": ["https://doi.org/10.1016/j.impact.2018.08.003"], "rights": null, "title": "Nitrogen and nitrogen isotope data for wheat and barley exposed to CeO2 nanoparticles"}