Fig. 1.

The expression patterns of MUS and MUL in roots. (a–c) MUS is mainly expressed in lateral roots and weakly expressed in the meristematic zone of the primary roots. (d–k) MUS is expressed in the lateral root primordia at all eight different developmental stages. (l–v) MUL is expressed in the vasculature of the seedlings and in the early stages of lateral root formation. The seedlings used for GUS staining were 5 d (a–c, l–n) or 8 d (d–k, o–v) after germination. PR represents primary root. I–VIII represent the eight development stages of lateral root primordia. Bars: (a, l) 2mm; (b, m) 1mm; (c–k, n–v) 25 μm.