Figure 4.

SOR seedlings had a higher percentage of survival following heat treatment. Ten-day-old Arabidopsis seedlings were maintained at 22°C throughout the experiment, treated at 38°C for 1.5 h followed by 45°C for 2 h, or treated at 45°C for 2 h. Following heat stress, the experimental group was returned to the 22°C incubator and all plates were left at 22°C for 7 d. The number of seedlings that survived was counted after 7 d. Eighteen seedlings per line were used in each experiment. The data are means ± sd from three independent experiments. WT, Wild type.