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The effects of CuO NPs on the integrity of rice seedlings cells membrane system. (A) MDA content; (B) the electrical conductivity of rice seedlings exposed to 62.5, 125 and 250 mg/L CuO NPs, supernatant from 250 mg/L CuO NPs suspensions and have no CuO NPs for 7 days. The bars indicates the mean and SD of triplicate samples. Different letters represent significant differences between the means of treatments (p < 0.05, Tukey-HSD).
