본 연구는 고농도 CO2 MAP가 ‘캠벨얼리’ 포도(Vitis labrusca L.) 의 상온 유통 중 품질 변화에 미치는 영향을 구명하기 위해 수행되었다. 시료가 담긴 용기내부를 15, 25, 50kPa CO2+5kPa O2(N2 balance)로 조성된 혼합가스 또는 100kPa CO2로 치환한 후 밀봉하였으며, 상온에서 8일간 보관하면서 중량 감소, 당도, 산도, 부패, 탈립, 갈변, 관능평가 등 품질 인자의 변화를 조사하였다. 수확 후 포도에 고농도 CO2를 처리하면 과방경과 소과경의 갈변, 과실의 부패, 그리고 탈립이 감소되고 기호도가 향상되는 결과를 나타내었다. 그러나 CO2 농도가 50kPa 이상 높아지면 이취가 발생하였고, 100kPa CO2 처리시에는 갈변, 부패, 탈립 발생이 다른 처리구(15, 25, 50kPa CO2)에 비해 오히려 증가하는 결과를 나타내었다. 본 연구 결과 15와 25kPa CO2 MAP 처리는 이취 발생 없이 포도의 외관 향상과 품질 유지를 위한 실용적인 기술로서 적용될 수 있을 것으로 판단되었다.
This study was conducted to evaluate the effect of high CO2 modified atmosphere packaging (MAP) conditions composed of 15, 25 and 50 kPa CO2+5 kPa O2 (balanced with N2), and 100 kPa CO2 on the quality of ‘Campbell Early’ grapes (Vitis labrusca L.). Fruit quality attributes including soluble solids content, titratable acidity, decay of berries, berry shattering, and browning of stalk and pedicel were measured during marketing simulation at ambient temperature. In CO2-treated bunches, the browning of stalk and pedicel, the decay of berries, and shattering were inhibited, and the organoleptic score was higher than in non-treated bunches. MAP with 50 and 100 kPa CO2, however, resulted in off-flavour. When 100 kPa CO2 was used to grapes, browning, decay, and shattering of bunches actually increased compared with the 15, 25, and 50 kPa CO2-treated ones. Our results, therefore, showed that high CO2 MAP with 15 and 25 kPa could be applied to grapes as a practical technique for improving appearance of the bunches and inhibiting the browning, decay, and shattering of the berries without off-flavour.
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