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Double mutant analysis of etr1-7 with etr2-1. A cross between etr1-7 and etr2-1 was made and etr1-7;etr2-1 double mutants were identified. Seedlings of Col-0 wt, etr1-7, etr2-1, and etr1-7;etr2-1 were grown in the dark in the presence of 10 μm ACC for 4 d.
