Figure 1

Inhibition of ethylene perception delays loss of pistil fruit set responsiveness to GA ₃ . (A) GA response of STS-treated pistils. Pistil or fruit length in inflorescences treated with 50 μM STS at 5 and 3 days before GA₃ treatment (●), and in control plants (o). (B) GA response of 1-MCP treated pistils. Pistil or fruit length in inflorescences treated daily with 1000 ppm 1-MCP from 1 day before anthesis to the day of GA₃ treatment (●), 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 GA₃ treatment, and the data (mean ± SE) were plotted against the pistil age at the time of treatment. Experiments were repeated three times.