Article | 06. 2015 Vol. 33, Issue. 3
Optimized Controlled Atmosphere Regimen for Storage of Fresh Fischer’s Ligularia (Ligularia fischeri Turcz.) Leaves

Department of Food Science and Biotechnology, Andong National University1
Institute of Agricultural Science and Technology, Andong National University2
Department of Food Science and Biotechnology, Daegu University3
Cheongsong Agriculture Technology & Extension4

2015.06. 375:382


A controlled atmosphere (CA) regimen was optimized during 3 consecutive harvest seasons as the basis of practical modified atmosphere packaging (MAP) storage for quality maintenance and extension of storage potential of fresh Ligularia fischeri leaves. Leaves were harvested in April or May and forced-air cooled to 4°C before punch-hole MAP (control, where gas concentrations were same as air) and CA treatments. CA regimens adjusted stepwise during 3 experimental years were: 1 and 3% O2, respectively combined with 5 and 10% CO2 in the first year, 3% O2 fixed in combination with 0, 2.5, and 5% CO2 in the second year, and 3% O2 fixed in combination with 2.5 and 5% CO2 in the third year. In the first year, higher incidence of black discoloration was observed with the reduction of respiration under 10% CO2 CA conditions regardless of O2 levels at 1 or 3%. In the second and third year, the incidence of the disorder seemed not to be clearly relevant to CA conditions showing slightly higher incidence only after 4- or 5-week storage + 5-day shelf life. Although texture and appearance quality were maintained better under the 3% O2 + 2.5% CO2condition after 4-week storage + 5-day shelf life, effects of CA on the extension of storage period was slight. Overall results indicated that Ligularia fischeri leaves are very susceptible to CO2 injury. CO2 concentration should be adjusted below 2.5% for safe and effective CA or MAP storage to maintain quality even during short-term storage.

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