FIGURE 6.

Effect of YM stage PEG stress on antioxidant enzyme activity. Jinmai47 and Shiluan02-1 were grown in the Hoagland nutrient solution in a controlled growth room chamber environment under a 16 h (25°C)/8 h (15°C) photoperiod. After 5 days of PEG6000 treatment, ears from Jinmai47 and Shiluan02-1 plants were harvested for determination of SOD (A) and POD (B) activity (n = 5). All values are shown as the means ± standard errors. Different letters indicate significant differences (Student-Newman–Keuls test, P < 0.05).