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Mitotic index obtained after 72 h of exposure to the corresponding stimuli, AgNPs (lined), PVP (dark gray), and AgNO3 (grid). The concentrations assessed are indicated in the figure. C− corresponds to untreated plants (light gray) and C+ to those exposed to 0.37 µg/mL of sodium arsenite (black). * Indicates significative differences with the negative control (p < 0.05); § indicates significative differences with the positive control (p < 0.05).
