ISHS Acta Horticulturae 768: XXVII International Horticultural Congress - IHC2006: International Symposium on The Role of Postharvest Technology in the Globalisation of Horticulture
EFFECTS OF LOW O2 OR HIGH CO2 CONCENTRATIONS ON THE QUALITY CHANGES OF CHINESE CHESTNUT (CASTANEA MOLLISSIMA BLUME) DURING COLD STORAGE |
| Authors: | Guixi Wang, Lisong Liang, Xiaohu Yang |
| Keywords: | chestnut, low O2 treatment, high CO2 treatment, cold storage, quality |
| Abstract:
Postharvest treatments including low O2 (0-5%) or high CO2 (30-80%) concentrations were conducted on Chinese chestnut (Castanea mollissima Blume cv. Dahongpao) and the quality changes were monitored during storage at 0°C. Both concentration of O2 or CO2 and duration of treatment were the main factors affecting quality. Off-flavors were detected in chestnuts when the O2 concentration was <2% or CO2 concentration were >50%. If treatment duration was <20 d, recovery from injury occurred completely during 120 d in cold storage. Chestnuts treated with 3-4% O2, or 40% CO2 for 20 d had the least amount of rots at the end of 120 d cold storage. Low O2 and high CO2 induced ethanol accumulation in chestnuts, but concentrations decreased during cold storage, and at the end of 120 d storage was the same as controls. The 4% O2 or 40% CO2 treatments for 20 d retarded starch hydrolysis during 120 d at 0°C. These experiments indicated that 4% O2 or 40% CO2 for 20 d were best conditions for maintaining chestnut quality at 0°C. | |
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