Fig. 1.

Natural senescence and ethylene production of wild-type (WT) Petunia × hybrida ‘Mitchell’ flowers. A representatives corolla phenotypes at different stages including corolla opening without anther dehiscence (D0), corolla expansion, 2 days after anthesis (D2), corolla with initial signs of senescence (D4), and wilting corolla (D7). B representatives ET production at various time points after corolla opening without anther dehiscence. ET emission was monitored using a laser-based ET detector (type ETD-300, Sense B.V., Nijmegen, The Netherlands) and a gas handling system (type VC-6, Sensor Sense B.V.). Three biological replicates of every flowering stage were performed. Values represent the average ± SD