AR and hydrops fetalis: The data for AR density confirmed the insensitivity of ein3eil1 to the endogenous and exogenous (ACC-derived) ethylene, because the AR response was higher than in the WT under HF and with ACC alone (2- and 3.4-fold, respectively) and there were no significant differences between the two, which was in contrast with the significant reduction occurring with ACC in the WT (Fig. 3B).