Effects of antioxidants on senescence of cut flowers of carnation treated with STS and Eustoma
Aki Inotsume, Kenji Yamane, Nobuaki Fujishige, and Yoshikazu T. Yamaki
Abstracts of 27th International Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
Information concerning free radicals involved in senescence of cut flowers is limited.In commercial production, ethylene sensitive flowers are treated with STS.Thus, the effects of antioxidants on senescence of cut flowers of carnation pretreated with STS and Eustoma was investigated.Cut flowers of carnations ‘Renoir’ and Eustoma ‘Halley Fantasy’ were held in 23°C, RH 60-80% and PPFD 10 mmol/m2/s (continuous lighting).Vase life was defined as days from cutting the flowers to the onset of 50%-petal wilting.Treatments with the radical scavengers; sodium benzoate, n-propyl gallate and melatonin slightly delayed wilting of petals by 2-3 days and 1-2 days for carnation and Eustoma, respectively.Ethylene production at 23°C by cut carnations 1 day after cold storage at 5°C for 4 weeks was significantly inhibited by the free radical scavengers from 58.5 to 1.5 nl/g FW/hr.The ethylene production declined 7 days and 14 days with or without the treatments.Theses results indicate that free radical scavengers prolonged shelf life of cut carnation pretreated with STS and Eustoma.And, free radicals could be involved in membrane deterioration during the final stages of vase life.