Cerium oxide nanoparticles alter the antioxidant capacity but do not impact tuber ionome in Raphanus sativus (L).
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abstract
The effects of nCeO2 on food quality are not well known yet. This research was performed to determine the impact of nCeO2 on radish (Raphanus sativus L.). Plants were cultivated to full maturity in potting soil treated with nCeO2 at concentrations of 0, 62.5, 125, 250, and 500mg/kg. Germination, growth, photosynthesis, ionome, and antioxidants were evaluated at different growth stages. Results showed that at 500mg/kg, nCeO2 significantly retarded seed germination but did not reduce the number of germinated seeds. None of the treatments affected gas exchange, photosynthesis, growth, phenols, flavonoids, and nutrients' accumulation in tubers and leaves of adult plants. However, tubers' antioxidant capacity, expressed as FRAP, ABTS(-) and DPPH, increased by 30%, 32%, and 85%, respectively, in plants treated with 250mg nCeO2kg(-1) soil. In addition, cerium accumulation in tubers of plants treated with 250 and 500mg/kg reached 72 and 142mg/kgdwt, respectively. This suggests that nCeO2 could improve the radical scavenging potency of radish but it might introduce nCeO2 into the food chain with unknown consequences.
Corral-Diaz, B., Peralta-Videa, J. R., Alvarez-Parrilla, E., Rodrigo-Garca, J., Morales, M. I., Osuna-Avila, P., ... Gardea-Torresdey, J. L.
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Corral-Diaz, Baltazar||Peralta-Videa, Jose R||Alvarez-Parrilla, Emilio||Rodrigo-García, Joaquin||Morales, Maria Isabel||Osuna-Avila, Pedro||Niu, Genhua||Hernandez-Viezcas, Jose A||Gardea-Torresdey, Jorge L
