This is the first study to examine the influence of nCuO in combination with As on the whole life cycle growth of rice plants. The study employed a factorial design conducted in a greenhouse to determine the main effects of nCuO (0, 0.1, 1.0, 10, 50, and 100 mg/L) and As (0 and 10 mg/kg) and their interaction effects on the whole life growth of rice (Oryza sativa japonica) plants. No significant effect was observed on seed germination. Both nCuO and As had a significant main effect on the fresh weight of the rice straw, the number of rice panicles, the panicle axis length (PAL), the numbers of panicle primary branch numbers and secondary branch numbers, and the grain numbers per panicle (p &lt; 0.05). The interaction effects of the two substances were also significant on the parameters (p &lt; 0.05). However, no main effect was observed for the average panicle weight by nCuO, but a significant main effect of As and its interaction effect with nCuO were observed on the parameter (p &lt; 0.01). nCuO had a main effect on the Cu and As accumulation in the rice grain husk and Cu accumulation in the dehusked grain, and the interaction effects with As were also significant (p &lt; 0.05). Meanwhile, As addition affected As and Cu accumulation in dehusked grain and As accumulation in the husk, and the interaction effects with nCuO were also significant (p &lt; 0.05). Exposure to nCuO did not affect As uptake in the dehusked grain, although it had interaction effect with As addition on the parameter. Arsenic addition did not affect Cu in the husk, but it had interaction effect with nCuO treatment on the parameter.

Effects of copper oxide nanoparticles and arsenic on the whole-life growth of rice (Oryza sativa japonica)

256th National Meeting (2018)

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