Ethylene insensitive or constitutive response mutants show delayed and premature loss of pistil fruit set responsiveness to GA
, respectively . (A) GA response in pistils of ethylene insensitive mutants ein2-5 (●), ein3-1 (■), and in control plants (o). (B) GA response in pistils of the ethylene constitutive response mutant ctr1-1 (●), and in control plants (o). Plants were in the cer6-2 background. Unfertilised pistils of different ages were simultaneously treated with 330 μM GA3. Pistil or fruit length was measured 10 days after treatment, and the data (mean ± SE) were plotted against the pistil age at the time of treatment. Data were normalised, and the size of the fruits treated at 0 DPA was 100%. Experiments were repeated three times.