Figure 7. Lateral root (LR) primordium numbers and LR density in seminal roots of wild-type (WT) and osnar2.1 knockdown lines (r1 and r2).

Seedlings were grown for 1 wk in nutrient solution containing 0.2 mM NO₃⁻ with or without NAA application (1 nM) in agar media. (a) LR primordium numbers and LR density in seminal roots; (b) DR5::GFP expression in the LR primordium; (c) DR5::GFP expression in the seminal root tips. Bar = 1 mm. Values are means ± SE (n = 6). *P < 0.05 (ANOVA) comparing WT plants subjected to 0.2 mM NO₃⁻ and five other treatments.