The effect of short-term high CO2 treatment on the physiological characteristics and blackening of cut-cabbage
Cheon Soon Jeong, Jong Nam Park, Jang Hun Kyoung, Jin Ho Joo and Sang Jun Park
Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
This study investigated the effect of short-term high CO2 treatment on the physiological characteristics and blackening of cut-cabbage.Cut-cabbage was exposed to air (control) and high concentration carbon dioxide (30, 60 and 90% CO2– balance N2) at room temperature (about 28°C) for 6 hours, and was then stored at 13°C for 3 days.Respiration rates and ethylene production after 0-1 of days were highest for 90% CO2 treatment and decreased in the order of 60% CO2, 30% CO2 and air treatment.The Hunter ‘L’ value, used as an indicator of blackening, rapidly decreased in cut cabbage leaves in air, but was delayed in the short-term high CO2 treatment; the inhibition of blackening was more effective as the CO2 concentrations increased.Polyphenol oxidase (PPO) activity was lower in the short-term high CO2 treatment, particularly in 90% CO2, than in air.Total phenol and ascorbic acid contents were greatest for 90% CO2 treatment, but CO2 concentrations above 60% significantly reduced total sugar contents.Weight loss increased slowly as the storage period extended, and was slightly greater in higher CO2 concentrations.In summery, a short-term high CO2 treatment for cut-cabbage significantly inhibited leaf blackening of cut cabbage due to a reduction of PPO activity and retention of ascorbic acid concentration with increasing CO2 concentration.