Figure 4.

Effect of auxin transport inhibitors on lateral root formation in wild-type and rib1 seedlings. Wild-type (gray bars) and rib1 (white bars) seedlings were grown for 4 d on control media and then transferred to media containing 0.1 μm NPA or TIBA. After 6 d of growth in the presence of auxin, the number of emerged lateral roots was counted. Data are expressed as a percentage of the number of lateral roots formed in the absence of inhibitor. Average and se of 36 individuals from two assays (NPA) or 54 individuals from three assays (TIBA) are presented.