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Concentration of Ag, mg per kg of dry plant tissue (A), root and shoot length (B), dry biomass (C), and water content (D) in radish seedlings exposed for 5 days to nAg at 0 (control), 125, 250, and 500 mg/L. Values are means of four replicates per treatment (15 plants each replicate) ± standard error. Different letters denote statistically significant differences according to the Tukey’s HSD test (p < 0.05). In (B), small case letters are for roots and upper case letters for shoots.
