Ethylene measurements on Arabidopsis seedlings were performed as previously described (Mira et al., 2016b). Briefly, 200 mg fresh weight of seedlings was incubated in a sealed 3-ml syringe for 3 h in the dark at 22 °C. The gas (1 ml) accumulated in the headspace was analysed with a Bruker 450-GC Gas Chromatograph. Data analysis was carried out using the Bruker Compass Data analysis 3.0 software. All experiments were performed in triplicate.
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