Fig. 7. Expression of MYB3R1 and MYB3R4. (A,B) Expression during the cell cycle. (A) Change in transcript abundance during the cell cycle in synchronized MM2d cells. Transcript levels of each gene were analyzed by quantitative RT-PCR. (B) Change in mitotic index of the synchronized MM2d cells. (C-L) Expression domains of MYB3R1::GUS (C,E,G,I,K) and MYB3R4::GUS fusions (D,F,H,J,L). (C,D) 12-day-old seedling. (E,F) Emerging lateral roots. (G,H) Root tips. (I,J) Flowers. (K,L) Ovules with developing embryos. Scale bars: 50 µm.