Hypersensitivity of the lip5 mutants to heat stress. A, Representative images of 5-week-old Arabidopsis plants after 8 h at 45°C and 3 to 5 d of recovery at 22°C. B, Representative images of 3-week-old Arabidopsis plants after 8 h at 45°C and 3 to 5 d of recovery at 22°C. C, Survival rate of 3-week-old plants after 8 h at 45°C and 3 to 5 d of recovery at 22°C. Means and se were calculated from three experiments. According to Duncan’s multiple range test (P = 0.05), means do not differ significantly if they are indicated with the same letter. WT, Wild type.