Fig. 2

Variations in total nitrogen (N) following anthesis in stay-green (YM66) and early-senescent (WM6) wheat. (A) the total nitrogen accumulation in the entire aboveground portion of the plant (mg plant⁻¹). Panels B, C, and D illustrate the total nitrogen concentration (%) in the leaf (B), stem and rachis (C), and grain (D). Measurements were conducted at 0, 10, and 20 days post-anthesis and at physiological maturity. Values are expressed as mean ± standard deviation (SD). Distinct symbols denote substantial differences among variants at P < 0.05.