Effects of postharvest treatment with low O2 or high CO2 on quality changes of Chinese chestnut (Castanea mollissima Blume) during cold storage
Gui-Xi Wang, Li-Song Liang, and Xiao-Hu Yang
Abstracts of 27th International Horticultural Congress & Exhibition (IHC 2006), August 13-19, 2006, COEX (Convention & Exhibition), Seoul, Korea. 494 pages.
2006
บทคัดย่อ
Quality changes in chestnut Castanea mollissima Blume, ‘Dahongpao’ were evaluated following postharvest shock treatment with low O2 (0-5%) or high CO2 (30%-80%) for 10, 20 and 25 days respectively and then stored at 0°C.Duration of treatment and O2 or CO2 concentration were the main factors affecting quality.Off-flavors were induced if O2 concentration was less than 2% or CO2 concentrations were higher than 50%.If the treatment duration was less than 20 days, the injury could be overcome completely in 120 days at 0°C.Chestnuts treated with 3% to 4% O2 or 40% CO2 for 20 days had the lowest incidence of decay after 120 days at 0°C.Low O2 and high CO2 induced accumulation of ethanol, but concentration decreased during storage, and after 120 days, ethanol concentrations were reduced to the same level as control.Using 4% O2 or 40% CO2 for 20 days retarded hydrolysis of starch during 120 days storage.A treatment of 4% O2 or 40% CO2 for 20 days had the most positive effect on maintaining quality of chestnuts during storage at 0°C.