Influence of ethanol on climacteric senescence in five cultivars of carnation

Abstract

The effects of ethanol on carnation (Dianthus caryophyllus L.) cut flowers were studied by treating five cultivars ('Yellow Candy', 'Sandrosa', 'Francisco', 'White Candy', and 'Iury') with up to 8% ethanol solution and measuring vase life, solution uptake, delay in bud opening of flowers, and ethylene production. Treatment with 4 or 6% ethanol increased the vase life of 'Yellow Candy', 'White Candy', and 'Iury', but not of 'Sandrosa' or 'Francisco'. Cultivars showed variable response to ethanol treatment with regards to uptake of solution, vase life increment, and delay in bud opening. The highest increment in vase life after flower opening with 4% ethanol was for 'Yellow Candy', where the vase life doubled. Total ethylene production in untreated † Corresponding author. H98044 Received 22 September 1998; accepted 9 December 1998flowers varied according to cultivars; treatment with 4% ethanol inhibited ethylene production as well as sensitivity to ethylene. 'Yellow Candy' was the most sensitive to ethylene and most responsive to ethanol; 'Sandrosa' was the least sensitive to ethylene and least responsive to ethanol treatment. The effectiveness of ethanol in extending vase life correlated closely with the longevity, ethylene production, and ethylene sensitivity of each cultivar.

Positive Interaction Of Ethanol With Malic Acid In Postharvest Physiology Of Cut Spray Carnation ‘White Natila’

“…Succinic acid was applied at the same concentrations as malic acid. Concentrations of ethanol (0, 2 and 4% v/v) were chosen based on previously obtained results Pun et al 1999). All the above chemicals were applied at preservative solutions.…”

“…This presumably ensured more carbohydrates that were available for petal metabolism leading to an increase in vase life . Pun et al (1999) used 1, 2, 4, 6 and 8% ethanol for preservation of five carnations cultivars and found a difference in response of cultivars to ethylene and thus applied ethanol. They assumed that it depends on differences in levels of ethylene production and carbohydrate reserves.…”

Vase Life Extension and Chlorophyll Fluorescence Yield of Bougainvillea Flower as Influenced by Ethanol to Attain Maximum Environmental Beautification as Ornamental Components

“…They also mentioned that treatment with 4% ethanol inhibited ethylene production as well as sensitivity to ethylene and responsive to ethanol. The effectiveness of ethanol in extending vase life correlated closely with the longevity, ethylene production and ethylene sensitivity [2] . Longevity of vase life is an important factor in consumer preference and considerable research has been carried out on the causes of carnation senescence [3,6].…”

“…It has been reported that bougainvillea bracteoles were attractive at the end of 6-day observation period and dropped 32.2% with treated the STS (0.5 oz/Gallon) while, 100% was dropped in control tree. [2] It has been reported that treatment with 4 and 6% ethanol increased the vase life of' carnation flowers and cultivars showed variable response to ethanol treatment with regards to vase life increment and delay in bud opening. They also mentioned that treatment with 4% ethanol inhibited ethylene production as well as sensitivity to ethylene and responsive to ethanol.…”

“…The treatments were water control, 2,4,8,10, 20, 30, 40, 50 and 70% ET. Flower longevity was 2 days more in 4, 8 and 10% ethanol than water control and other concentrations of ethanol.…”