The ability of aox1a:rpoTmp to withstand oxidative stress. A, Four-week-old Arabidopsis plants were subject to bleaching overnight (16 h) in different concentrations of H2O2 (note that, for rpoTmp and aox1a:rpoTmp, plants were 4 and 5 weeks old, respectively, to match developmental stages as close as possible). B, Four-week-old plants from Col-0, aox1a, rpoTmp, and aox1a:rpoTmp were stained for ROS production using DAB (H2O2) and NBT (O2−).