Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effect of 1-methylcyclopropene Treatment on Extension of Freshness and Storage Potential of Fresh Ginseng

1-methylcyclopropene 처리의 수삼의 신선도 유지 및 저장성 연장 효과

  • Park, Me-Hea (Vegetable Research Division, National Institute of Horticultural & Herbal Science) ;
  • Shin, Yu-Su (Herbal Crop Utilization Research Team, National Institute of Horticultural & Herbal Science) ;
  • Kim, Sun-Ju (Department of Bio Environmental Chemistry, Chungnam National University) ;
  • Kim, Ji-Gang (Vegetable Research Division, National Institute of Horticultural & Herbal Science)
  • 박미희 (국립원예특작과학원 채소과) ;
  • 신유수 (국립원예특작과학원 인삼특작이용팀) ;
  • 김선주 (충남대학교 생물환경화학과) ;
  • 김지강 (국립원예특작과학원 채소과)
  • Received : 2012.11.15
  • Accepted : 2013.02.08
  • Published : 2013.06.30
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Abstract

Fresh ginseng has a limited storage life due to the quality change caused by microbial spoilage as well as physiological deterioration. The present study investigated the effects of 1-methylcyclopropene (1-MCP) treatment, an inhibitor of ethylene action, on the microbial growth and quality maintenance of fresh ginseng during storage. Harvested fresh ginsengs were treated with $1{\mu}L{\cdot}L^{-1}$ 1-MCP for 20 hours at $4^{\circ}C$ and then stored at room temperature (RT) for 18 days or low temperature ($4^{\circ}C$) for 160 days. After 18 days of storage at RT, the percentage weight loss in 1-MCP treated fresh ginseng (8.3%) is lower than that of control (10.1%). During long-term storage at $4^{\circ}C$, weight losses were increased slightly until 120 days without difference between non-treated and 1-MCP ginsengs. In contrast, after 120 days of storage at $4^{\circ}C$, higher increase in weight loss was observed in non-treated ginsengs than in 1-MCP treated ginsengs. Respiration rate and ethylene production of fresh ginseng were reduced by 1-MCP treatments at RT. The 1-MCP treatment also resulted in lower microbial population compared to those of non-treated ginsengs at RT. However, in ginsengs stored at $4^{\circ}C$ for short-term (45 days), no differences were noted in weight loss and microbial population between 1-MCP treated and non-treated ginsengs. Major ginsenosides was not changed by 1-MCP treatment during the 7 days of storage at RT. Results suggest that 1-MCP treatment can be used to maintain the freshness of ginseng at room temperature for short term storage and at low temperature for long term storage. 1-MCP treatment could be applied on fresh ginseng to avoid deleterious effect of exogenous ethylene during storage and shipping.

수삼은 생리적인 노화와 미생물군에 의한 부패에 따른 품질의 변화로 인해 상대적으로 낮은 저장력을 가지고 있다. 본 연구는 에틸렌 작용 억제제인 1-methylcyclopropene(1-MCP) 처리가 수삼의 저장기간 동안 품질 및 미생물군에 미치는 영향을 조사하였다. 수확된 수삼은 $1{\mu}L{\cdot}L^{-1}$ 1-MCP를 $4^{\circ}C$에서 20시간 처리 후 상온에서 18일간, 저온($4^{\circ}C$)에서 160일간 저장하였다. 상온에서 18일간 저장 시 1-MCP가 처리된 수삼의 중량감소율은 8.3%로 무처리구의 10.1%에 비해 낮게 나타났다. 수삼을 $4^{\circ}C$에서 장기저장 시, 중량감소율은 저장 120일까지는 1-MCP 처리구와 무처리구간의 차이 없이 약간 증가하였다. 반면에 $4^{\circ}C$에서 120일 이상 저장 시는 1-MCP 처리구에 비해 무처리구가 높은 중량감소율이 나타났다. 수삼의 호흡량과 에틸렌 발생량은 상온저장 시 1-MCP 처리구가 대조구에 비해 낮았다. 또한 1-MCP 처리는 상온저장 시 대조구에 비해 미생물군이 적게 나타났다. 반면에 저온에서 단기저장 시(45일간)에는 1-MCP 처리구와 무처리구간의 중량감소율과 미생물 군에서의 유의한 차이는 없었다. 1-MCP 처리에 따른 중요한 ginsenosides 함량의 변화도 없었다. 본 연구결과는 1-MCP가 상온에서 단기저장 시 및 저온에서 장기저장 시 수삼의 신선도 유지를 위해 사용될 수 있음을 제시한다. 또한 1-MCP 처리는 수삼이 저장 및 수송 중에 접할 수 있는 외부 에틸렌의 유해한 영향을 방지하기 위해 수삼에 적용할 수 있을 것으로 판단된다.

Keywords

References

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