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. 2003 May;132(1):185–195. doi: 10.1104/pp.102.018887

Figure 1.

Figure 1

Ion leakage, ET evolution, and JA and SA concentrations in three 1-year-old wild-type birch clones, V5818, K1898, and E9702, in response to O3. Clones were subjected to 200 nL L−1 O3 for 8 h, and leaves were harvested for ion leakage and hormone determinations after the beginning of the exposure at the times indicated. Black bar indicates the duration of O3 fumigation. Measurements were conducted from three independent ramets at each time point/clone. Two-way ANOVA (clone and time as factors) followed by Tukey's honestly significant difference (HSD) mean-separation test was used to detect statistically significant differences between the clones. A, Ion leakage (P = 0.163); B, ET evolution (P = 0.074); C, free JA concentrations (ANOVA, P < 0.0005; E9702 had lower JA accumulation than V5818 and K1898, Tukey's HSD mean-separation test P < 0.0005 and P = 0.001, respectively); D, free SA concentrations (ANOVA, P < 0.0005; K1898 had higher SA accumulation than V5818 and E9702, Tukey's HSD mean-separation test P < 0.0005 and P = 0.006, respectively).