Fig. 5 Chlorophyll concentrations in the flag leaves of semi-winter wheat cultivars Yangmai 158 (A) and Yangmai 931 (B) in the pot experiment and winter wheat cultivar Yanfu 188 (C) in the field experiment after controlled soil drying was applied. Treatment details are the same as in Fig. 1. Arrows in the figure indicate the start of soil drying treatments. Vertical bars represent ± SE of the mean where values exceed the size of the symbol