Horticultural Science and Technology 원예과학기술지 ISSN:1226-8763(Print) 2465-8588(Online)

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.