Fig. 5.

H₂O₂ content in the ssadh-1 mutant exposed to various light conditions. H₂O₂ was quantified in ssadh-1 and WT shoots as described in Materials and Methods. Plants were grown in vitro for 4 weeks in complete darkness (Dark) or under low-fluence WL at 10 μmol·m^-2·s^-1 for 4 weeks (WL-low) or for 2 weeks under low-fluence WL followed by 2 weeks under high-fluence WL at 90 μmol·m^-2·s^-1 (WL-low + WL-high). Measurements were performed on bulks of 5–10 individual seedlings. For each light condition, data represent an average of six measurements performed in two independent experiments. Error bars represent SD.