Fig. 1.
Ozone sensitivity of antioxidant mutants. Plants of the indicated genotypes were exposed to a single 6-h pulse of 375 nl l−1 of ozone and cell death was monitored as ion leakage at 8 h after the beginning of the exposure. The presented data are the average and ±SE of five biological repeats of this experiment, with each repeat consisting of five samples. Mean values of ozone treatment that differed significantly from controls were identified with a linear model and Bonferroni correction (*P <0.05, **P <0.01, ***P <0.001).