Figure 6.

Third-Order Lateral Root Development in Single amt Mutants on the Ammonium-Containing Plate Side.

(A) to (D) Total third-order lateral root (LR) length.

(E) to (H) Third-order lateral root density of plants grown for 15 d on vertically split agar plates with a localized supply of 0.8 mM ammonium.

(A) and (E) Col-gl and amt1;1-1.

(B) and (F) Col-0 and amt1;2-1.

(C) and (G) Ws-0 and amt1;3-1.

(D) and (H) Col-gl and amt2;1-1.

Bars represent means (±se), and asterisks denote significant differences at P < 0.05 (Student’s t test); ns, not significant; n = 12 to 20.