1-Methylcyclopropene(1-MCP)와 MAP 처리가 저온 저장 중 복숭아 ‘대홍’의 품질 변화에 미치는 영향 = Effect of 1-Methylcyclopropene (1-MCP) Treatment and MAP on Quality Changes of Peach ‘Daehong’ during Cold Storage

국문 초록 (Abstract)

본 연구는 ‘대홍’ 복숭아를 대상으로 수확 후 1-MCP 처리와 MAP가 저온 저장 중 복숭아 ‘대홍’의 품질 변화에 미치는영향을 알아보고자 수행하였다. 1-MCP는 1μL·L-1과 2μL·L-1 농도로 처리하여, MAP 포장 후 온도 5±1℃, 습도 85±5%의저온 저장고에서 28일 저장하였고, 포장 대조구로 골판지 상자를 설정하여 품질변화를 비교하였으며, 각각의 포장 처리구에는 1-MCP를 처리하지 않은 대조구로 두었다. 저장 중 생체중 감소율은 MAP 포장구에서 1-MCP 처리구와 무처리구과실 간에 유의한 차이가 없었으며 MAP보다 골판지 상자 포장구의 과실에서 감소율이 높았다. 호흡률과 에틸렌 발생률은 1μL·L-1 처리구와 2μL·L-1 처리구에서 유사한 경향을 나타내었고, 대조구는 1-MCP 처리구와 통계적 유의성을 보이며높게 발생하였다. 포장 내 이산화탄소는 1-MCP 처리구에서12% 내외로 무처리구에 비해 낮았고, 에틸렌은 1μL·L-1 처리구의 과실에서 다른 처리구와 유의성을 보이며 가장 낮게 유지되었다. 저장 기간이 경과할수록 경도는 대조구보다1-MCP와 MAP를 처리한 과실에서는 9%(1μL·L-1 MAP)와5%(2μL·L-1 MAP)로 유의하게 연화가 억제되었다. 과피와과육의 Hunter a* 값은 1μL·L-1 처리구에서 대조구보다 유의하게 높았고, 안토시아닌도 1μL·L-1 처리구에서 다른 처리구에 비해 저장 중 높은 값을 나타내었으며, 특히 MAP 포장한과실에서 높았다. 위의 결과를 종합해 보면, 1μL·L-1를 처리한MAP 포장구에서 ‘대홍’ 복숭아의 저장 중 호흡률 및 에틸렌발생량이 낮았고 경도, 과피와 과육의 Hunter a* 및 안토시아닌 함량 변화가 적은 것으로 조사되어 ‘대홍’ 복숭아의 저장 중품질 유지에 가장 적합하다고 판단된다.

다국어 초록 (Multilingual Abstract)

This study is in order to the effect of 1-methlycyclopropene (1-MCP) treatment and film package as modified atmosphere packaging (MAP) on the changes in fruit quality factors of 'Daehong' peaches during cold storage. The concentrations of 1-MCP were treated at 1μL·L-1 and 2μL·L-1, and peaches in film package were stored for 28 days in cold storage at 5±1°C and 85±5% RH. The fruits stored carton box were used as a control of MAP, and 1-MCP free fruits were used as the control of both packages. Rate of fresh weight loss during storage was not significantly different between groups with and without 1-MCP treatment, but was higher in the box package than in the MAP. The control group had a higher incidence of both gases with the 1-MCP treatment group showing statistically significantly low. Carbon dioxide in the package was lowered by about 12% compared to the non-treated group, and the ethylene concentration was maintained at 1μL·L-1, showing a significance low compared to other treated groups.
As the storage period elapsed, the firmness of 1-MCP and MAP treated fruits remained significant at 5-9% compared to the control group. Regardless of the packaging method Hunter a* values of exocarp and mesocarp were significantly higher in fruit treated with 1-MCP 1μL·L-1 treatment than in the control group, and anthocyanin was significantly higher in the fruit during the storage period, especially high in MAP. In summary, fruits of MAP group with 1-MCP 1μL·L-1 had rate of lower respiration and ethylene production, and little changes in firmness, Hunter a* values of exo-carp and meso-carp, and anthocyanin, which is considered the most suitable method for preserving postharvest quality of the peach cultivar during the storage.

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