Fig. 4

Phenotype (a) and ethylene production in gynoecia (b) of TRV control and RhMKK9-silenced flowers. At least 15 flowers were used for each time point. Representative results are shown. Asterisks indicated significant differences calculated using the t test (**p < 0.01). D16, dehydration for 16 h; R1, rehydration for 1 h. 0, 1, 2, and 3 d, the day(s) after rehydration. Note, compared with the RhMKK9-silenced flower, the TRV flower showed obvious senescence symptoms on d 3, such as drooped (side view) and bluing petals (top view)