Figure 2.

Effects of NaHS pretreatment on electrolyte leakage (A) and malonaldehyde (MDA) content (B) under heat stress at 47°C. Seedlings of maize were irrigated with 100 ml of 0 (control), 0.3, 0.6, 0.9 and 1.2 mM NaHS for 6 h, respectively, and then subjected to heat stress at 47°C for 15 h, the electrolyte leakage in roots and MDA content in coleoptiles was determined. Error bars represent standard error and each data in figure represents the mean ± SE of three experiments, and asterisk and double asterisks indicate significant difference (P < 0.05) and very significant difference (P < 0.01) from the control without NaHS treatment, respectively.