Fig. 6.

The mpk6wb/lr mutant has increased LR initiation. LR formation in wild-type (Wt) and mpk6wb/lr seedlings. (A) Density of LRs and LRP in the primary root branching zone. (B) Density of LRs and LRP in branching and in LR formation zones. (C) Cortical cell length in the LR formation zone. For each individual root, 10 fully elongated cortical cells were measured. (D) LR initiation index in the LR formation zone. Error bars represent mean ±SE of 23 roots from two independent experiments. Asterisks mark Student’s t-test significant differences at the P values indicated.