Wheat exposure to cerium oxide nanoparticles over three generations reveals transmissible changes in nutrition, biochemical pools, and response to soil N
Department or Administrative Unit
This study investigated the effects of third generation exposure to cerium oxide nanoparticles (CeO2-NPs) on biomass, elemental and 15N uptake, and fatty acid contents of wheat (Triticum aestivum). At low or high nitrogen treatment (48 or 112 mg N), seeds exposed for two generations to 0 or 500 mg CeO2-NPs per kg soil treatment were cultivated for third year in soil amended with 0 or 500 mg CeO2-NPs per kg soil. The results showed that parental and current exposures to CeO2-NPs increased the root biomass in daughter plants with greater magnitude of increase at low N than high N. When wheat received CeO2-NPs in year 3, root elemental contents increased primarily at low N, suggesting an important role of soil N availability in altering root nutrient acquisition. The δ15N ratios, previously shown to be altered by CeO2-NPs, were only affected by current and not parental exposure, indicating effects on N uptake and/or metabolism are not transferred from one generation to the next. Seed fatty acid composition was also influenced both by prior and current exposure to CeO2-NPs. The results suggest that risk assessments of NP exposure may need to include longer-term, transgenerational effects on growth and grain quality of agronomic crops.
Rico, C. M., Abolade, O. M., Wagner, D., Lottes, B., Rodriguez, J., Biagioni, R., & Andersen, C. P. (2020). Wheat exposure to cerium oxide nanoparticles over three generations reveals transmissible changes in nutrition, biochemical pools, and response to soil N. Journal of Hazardous Materials, 384, 121364. https://doi.org/10.1016/j.jhazmat.2019.121364
Journal of Hazardous Materials
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