The SOR lines had lower heat-induced transcripts. RNA was collected from 14-d-old Arabidopsis seedlings. cDNA was generated and then amplified using PCR with gene-specific primers for APXs and Zat12 (H2O2-sensitive transcription factor). Actin primers were used as loading controls. PCR samples were analyzed by gel electrophoresis. W, Wild-type; G, GFP; 1, 3, 8, and 9, SOR lines 1, 3, 8, and 9.