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Chlorophyll (A), flavonol (B), and anthocyanin (C) index (relative units) in A. arenosa (gray) and A. halleri (green) leaves after 120 h of experiment. Ctr—control; Cd−1.0 mM Cd treatment; Zn−5.0 mM Zn treatment. Values are means (n = 30). Means followed by the same letter are not significantly different from each other, using Tukey HSD test (P < 0.05).
