Expression analysis of YAB3, WOX3, and KNOX genes in YAB3 RNAi and WOX3 overexpression plants. A, YAB3 transcript levels revealed by RT-PCR in wild-type (WT), a nonphenotypic (Y-L), and three phenotypic (Y1 to Y3) YAB3 RNAi transgenic plants. B, WOX3 transcript levels revealed by northern blots in wild-type (WT), a nonphenotypic (W-L), and three phenotypic (W1–W3) WOX3 overexpression transgenic plants. C, Transcript levels of rice KNOX genes OSH1 and OSH3 revealed by RT-PCR in leaves from wild-type (WT), phenotypic YAB3 RNAi (Y1 and Y2), and WOX3 overexpression plants (W1 and W2). Shoot apex mRNA was used as a positive control (S).