Overlapping expression patterns of the FRA8, F8H, IRX9, IRX9-L, IRX14, and IRX14-L genes. GUS expression in root tissues of plants transformed with proFRA8:GUS (A), proF8H:GUS (B), proIRX9:GUS (C), proIRX9-L:GUS (D), proIRX14:GUS (E), proIRX14-L:GUS (F). GUS expression in leaves of plants transformed with proFRA8:GUS (G), proF8H:GUS (H), proIRX9:GUS (I), proIRX9-L:GUS (J), proIRX14:GUS (K), proIRX14-L:GUS (L). Expression of YFP-NLS driven by the IRX10 (M), IRX10-L (N), FRA8 (O), F8H (P), IRX9 (Q), IRX9-L (R), IRX14 (S), and IRX14-L (T) promoters, respectively. Scale bar, 50 μm.