Figure 3.

N limitation effect on root system of the maize hybrid SRG-150 and its parents lines SRG-100 and SRG-200. Images were taken by the WinRHIZO system, (A) plants grown at 3 mM; (B) plants grown at 1 mM. (C) Roots length of the different parts of the root system under N limitation, classified based on the diameter (A = 0–0.3; B = 0.3–0.5; C = 0.5–1; D = 1–2; E = 2–5 mm). Data are means ± SD (n = 3). Bars with different letters indicate a significant difference at P ≤ 0.05 (Tukey’s Honestly Significant Difference Test).