Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effects of Postharvest 1-MCP Treatment, Storage Method, and Shelf Temperature on Quality Changes of 'Gamhong' Apples during Export Simulation

수확후 1-MCP 처리, 저장 방법 및 현지 유통온도가 모의수출 '감홍' 사과의 품질에 미치는 영향 분석

  • Park, Youn-Moon (Department of Food Science and Biotechnology, Andong National University) ;
  • Yoon, Tae-Myung (Department of Horticultural Sciences, Kyungpook National University)
  • Received : 2012.06.04
  • Accepted : 2012.09.13
  • Published : 2012.12.31
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Abstract

Effects of postharvest 1-methylcyclopropene (1-MCP) treatment, controlled atmosphere (CA) storage, and shelf temperature on quality of 'Gamhong' apples were analyzed during export simulation. Fruits were harvested at the optimum maturity for long-term storage, treated with $1{\mu}L{\cdot}L^{-1}$ 1-MCP for 16 hours, and then stored for 6 months under air and CA conditions at $0^{\circ}C$. Poststorage export procedure was performed by applying additional 2-week refrigerated storage and 7-day shelf-life test at 7 and $20^{\circ}C$, which simulated container shipment and local distribution, respectively. After storage and during export simulation, rates of respiration and ethylene evolution were significantly lower in 1-MCP treated and CA-stored apples. For the reduction of respiration, CA storage was more effective than 1-MCP treatment. Soluble solids content was maintained higher in 1-MCP treated apples, while titratable acidity was maintained better both in the 1-MCP treated and CA-stored apples. Effects of 1-MCP treatment and CA storage were highly significant in maintaining flesh firmness and sensory texture ratings. Additive effects from combined application of 1-MCP treatment and CA storage were occasionally observed. Shelf temperature during the local distribution simulation seemed not to significantly influence quality changes only showing limited effects on flesh firmness. Overall results suggest that storage potential of 'Gamhong' apples is shorter than 4 months in control fruit under refrigerated air conditions, whereas the potential can be extended to longer than 6 months by 1-MCP treatment and CA storage. Postharvest program should be provided considering the time of export, i.e. period of storage, and duration of local distribution.

'감홍' 사과의 수확후 1-MCP 처리, CA 저장 및 유통온도가 모의 수출과정 중 품질유지에 미치는 효과를 분석하였다. 사과는 장기저장에 적합한 성숙도에서 수확하여 $1{\mu}L{\cdot}L^{-1}$ 농도의 1-MCP 처리 후 $0^{\circ}C$ 저온(air)과 $O_2$ 1.5kPa + $CO_2$ 2.5kPa CA 환경에서 각각 6개월간 저장하였다. 저장 후 모의 수출과정은 $0^{\circ}C$에서 2주간의 해상 운송 모의 과정을 거쳤으며 현지 유통과정은 저온($7^{\circ}C$) 과 상온($18-22^{\circ}C$)에서 7일로 설정하였다. $20^{\circ}C$ 온도 평형 후 측정한 저장 직후 및 모의 운송 후 호흡속도와 에틸렌 발생률은 1-MCP 처리와 CA 저장 사과에서 유의적으로 낮았고 호흡속도의 경우 CA 저장의 효과가 보다 뚜렷하였다. 모의 수출과정 후 당도는 1-MCP 처리에서 산함량은 1-MCP 및 CA 저장 사과에서 뚜렷하게 높았다. 1-MCP 처리와 CA 저장은 모든 시점에서 과육 경도 및 조직감 유지에 뚜렷한 효과를 보였으며, 조사 시점에 따라 상가효과가 있는 것으로 분석되었다. 현지에서의 저온유통은 과육 경도 유지에 효과적이었던 반면, 당도나 산함량에는 유의적인 영향을 미치지 않았다. 본 실험결과를 종합해보면, 수출을 목적으로 하는 '감홍' 사과의 저장 한계기간은 무처리 사과의 저온저장 시 4개월 이내, 1-MCP 처리 후 CA 저장 시에는 6개월 이상까지 가능한 것으로 나타나, 국내 저장기간과 현지 유통기간에 따라 차별화된 수확후관리기술 프로그램이 적용되어야 할 것으로 판단되었다.

Keywords

References

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