Fig. 4.

Osmotic stress alone inhibits LR elongation but does not stimulate LR proliferation. (A–E) Seedlings grown on 10 μM KNO₃ medium for 4–5 d were transferred to 1 mM KNO₃ medium ±100 mM mannitol for 21 d. Data are mean ±SE (n=20). * Significant difference (P ≤0.05) between unstressed and stressed roots (Fisher's protected LSD test). The data are representative of similar results in three independent experiments. Top, Middle, Bottom: the different segments of the segmented agar plate.