Fig. 6

Effects of H2S exposure on photorespiratory H2O2 -producing enzyme and associated substrate in cat2 mutants. a and b, Extractable leaf GOX activity and glycolate content. c and d, GOX1 and GOX2 transcript levels. 16-day-old seedlings of Col-0 and cat2 were treated with gaseous H2S released from 0.5 mM NaHS solution under standard growth conditions for another 4 d. Values are means ± SE of three biological replicates. Different letters indicate significant differences by multiple pairwise t-test comparisons at P < 0.05