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Ethylene treatment causes radial swelling of Arabidopsis stems. A, Stems of 3-week-old wild-type and eer1 plants treated with either 229 μL L−1 NBD, air, or 1 μL L−1 ethylene for 8 d. B, Measurements of stem thickness immediately following the treatments described in A. Mean ± se values were determined from 10 plants.
