Figure 4.

Changes of H₂O₂ content and enzyme activity in HT and control pericarp. A: H₂O₂ content. Samples at 2 h and 1, 6 and 32 DAT were used for H₂O₂ content determined in HT and control pericarp. B-D: Enzyme activity. Samples at 1, 6, 12 and 32 DAT were used for enzyme activity determination. PAL: phenylalanine ammonia-lyase; SOD: superoxide dismutase; POD: peroxidase. Four replicates were completed and statistically significant differences analysis was conducted between HT and control pericarp during the same period using Student’s t-test. *: significant difference (P < 0.05). Mean values and SE bars are provided.