A) Hydrogen peroxide content of wild-type, <i>erf6</i> mutant and complemented <i>erf6</i> mutant plants was measured at 5 h after spraying 4-week-old soil-grown plants with H₂O₂.

<p>The content of H₂O₂ is expressed as relative fluorescent units. B) Anthocyanin content and C) <i>CHS</i> (<i>CHALCONE SYNTHASE</i>) expression in wild-type, <i>erf6</i> and complemented <i>erf6</i> plants was measured at 12 h after transferring plants from low light to high light conditions. Three independent biological replicates (20 plants each) were used for each treatment. Error bars represent standard deviations. Letters indicate significant differences determined by two-way ANOVA.