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Phenotypes of the etr2-1 mutant and the etr2-1 transgenic plants. (A) etr2-1 grown in the presence of ethylene has larger leaves than the wild type. (B) etr2-1 treated with ethylene has delayed leaf senescence compared with wild type. (C) Wild-type plants transformed with the mutant etr2 gene display ethylene-insensitive phenotypes in the triple response assay. Tetr2-1, etr2-1 transgenic plants.
