Figure 7.

Third-Order Lateral Root Development in the 35S:AMT1;3-Transformed amt1;3-1 Insertion Line.

Total third-order lateral root (LR) length (A), third-order lateral root density (B), and ¹⁵N concentrations (C) in roots from ¹⁵N-labeled ammonium supplied to the HN compartment. Ws-0, amt1;3-1, and amt1;3-1-35S:AMT1;3 plants were grown for 15 d on vertically split agar plates with a localized supply of 0.8 mM ammonium. Bars represent means (±se), and different letters denote significant differences at P < 0.05 (Tukey’s test); ns, not significant; n = 12 to 20. DW, dry weight.