The role of ethanol or acetaldehyde in the biosynthesis of ethylene in carnation (Dianthus caryophyllus L.) cv. Yellow Candy
U. K. Pun, J. S. Rowarth, M. F. Barnes and J. A. Heyes
Postharvest Biology and Technology Vol: 21 Issue: 2 Pages: 235-239.
2001
บทคัดย่อ
Carnation (Dianthus caryophyllus L.) cv. Yellow Candy flowers were
treated with ethanol solution (4%) in the absence or presence of 1 or 10 mM 
-methionine,
or ethanol or acetaldehyde solution (0.05%), in the absence or presence of 1 mM
aminocyclopropane carboxylic acid (ACC). Spermidine in petals was measured over
time in flowers treated with 4% ethanol or distilled water. Ethanol treatment
significantly increased vase life by 10 days; methionine had no significant
effect. The vase life of ACC-treated flowers was reduced by 4 days, the
ethylene climacteric peak advanced by 5 days and ethylene production was
increased in comparison with flowers not treated with ACC. In the absence of
ACC, ethanol solution significantly increased vase life of carnation cv. Yellow
Candy by 5 days and inhibited ethylene production, whereas in the presence of
ACC, ethanol neither increased vase life nor inhibited ethylene production.
Acetaldehyde also failed to increase vase life of carnation cv. Yellow Candy
either in the absence or presence of ACC. There was no difference between
spermidine content of ethanol- or distilled water-treated flowers. It was
concluded that 4% ethanol failed to inhibit conversion of methionine to S-adenosyl
methionine (SAM) because ethanol failed to inhibit production of spermidine.
Furthermore, ethanol or acetaldehyde also failed to inhibit conversion of ACC
to ethylene.