FIGURE 5.

Seed priming enhanced ZmSOD4 (A), ZmAPX2 (B), ZmCAT2 (C), and ZmGR (D) expression in response to chilling stress. Seed embryos were collected, respectively, at 0, 6, 24, 48, and 72 h after sowing, and six replications for each treatment at each sampling time were used. Different small letter(s) on the top of the bars indicated significant differences (p < 0.05, LSD) among treatments at the same time. Error bars indicated ± SE of mean (n = 6). For additional explanations, please see Table 1.