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

Figure 4.

Figure 4

O3-induced ion leakage, ET evolution, and the effect of blocking of ET biosynthesis in 3-month-old birch clone V5834 and in the transgenic line BPetr1-1-35 carrying Arabidopsis ET receptor gene with the dominant etr1-1 mutation. Ramets were sprayed either with 0.05% (v/v) Tween 20 or with 1.5 mm aminooxyacetic acid (AOA) in 0.05% (v/v) Tween 20 to block ET biosynthesis and were exposed to 200 nL L−1 O3 for 6 h. Leaves were harvested for ET and ion leakage determinations at 0, 6, 8, and 24 h. Error bars indicate ±se (n = 3). Black bars indicate the duration of O3 exposure. A, Ion leakage in the wild-type clone V5834 and in the transgenic line BPetr1-1-35. B, ET evolution in the wild-type clone V5834 and in the transgenic line BPetr1-1-35. C, Ion leakage in the wild-type clone V5834 and in the transgenic line BPetr1-1-35 with and without the AOA treatment. D, ET evolution in the wild-type clone V5834 and in the transgenic line BPetr1-1-35 with and without the AOA treatment.