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Effects in P. ramosa radicle of (A) DMBQ 1 mM; (B) DMBQ 1 mM detail; (C) DMBQ 0.5 mM; (D) DMBQ 0.1 mM; (E) 7,4′-O,O′-dimethylquercetin (6) 0.1 mM; (F) 3,7-O,O′-dimethylquercetin (7) 0.1 mM; (G) 3,7,3′,4′-O,O′,O″,O‴-tetramethylquercetin (8) 0.1 mM; (H) control.
