Pollination induced an immediate increase in ethylene production in Dianthus caryophyllus and Petunia hybrida . In Cymbidium, a lag of several hours was observed . In all three species, pollination induced premature flower senescence . Treatment of the stigmatic surface with aminoethoxyvinylglycine prior to pollination effectively blocked the increase in ethylene production and alleviated the detrimental effect of pollination on flower life .In all three tested species, octanoic and decanoic acids, when applied to the stigmatic surface, had no effect on ethylene production and flower life . In isolated Cymbidium lips placed with their cut base in solutions containing these fatty acids, no effects on red colouration, ethylene production, and ethylene forming enzyme activity were observed . In addition, ethylene sensitivity of isolated lips was not affected . The putative regulatory role of short-chain saturated fatty acids in (pollination-induced) flower senescence is discussed .
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