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Effect of Preharvest and Postharvest 1-Methylcyclopropene (1-MCP) Treatments on Fruit Quality Attributes in Cold-stored 'Fuji' Apples

수확 전·후 1-MCP처리가 '후지' 사과의 저온저장 중 과실품질에 미치는 영향

  • Yoo, Jingi (Department of Horticultural Science, Kyungpook National University) ;
  • Kang, Bong Kook (Department of Horticultural Science, Kyungpook National University) ;
  • Lee, Jinwook (Department of Horticultural Science, Kyungpook National University) ;
  • Kim, Dae Hyun (Department of Horticultural Science, Kyungpook National University) ;
  • Lee, Dong Hoon (Planning and Coordination Division, National Institute of Horticultural & Herbal Science, RDA) ;
  • Jung, Hee-Young (College of Agriculture and Life Science, Kyungpook National University) ;
  • Choi, DongGeun (Department of Horticulture Science, Chonbuk National University) ;
  • Choung, Myoung-Gun (Department of Herbal Medicine Resource, Kangwon National University, Dogye Campus) ;
  • Choi, In Myung (Fruit Research Division, National Institute of Horticultural & Herbal Science, RDA) ;
  • Kang, In-Kyu (Department of Horticultural Science, Kyungpook National University)
  • 유진기 (경북대학교 원예과학과) ;
  • 강봉국 (경북대학교 원예과학과) ;
  • 이진욱 (경북대학교 원예과학과) ;
  • 김대현 (경북대학교 원예과학과) ;
  • 이동훈 (국립원예특작과학원 기획조정과) ;
  • 정희영 (경북대학교 응용생명과학부) ;
  • 최동근 (전북대학교 원예학과) ;
  • 정명근 (강원대학교 생약자원개발학과) ;
  • 최인명 (국립원예특작과학원 과수과) ;
  • 강인규 (경북대학교 원예과학과)
  • Received : 2015.03.25
  • Accepted : 2015.05.02
  • Published : 2015.08.31

Abstract

This work was carried out to evaluate the effects of preharvest 1-methylcyclopropene (1-MCP, $Harvista^{TM}$) and postharvest 1-MCP ($SmartFresh^{TM}$) treatments on the fruit quality attributes of cold-stored 'Fuji' ( Malus domestica Borkh.) apples. Fruits were exposed to 0, 95, 125, or $250 mg{\cdot}L^{-1}$ $Harvista^{TM}$ at 3, 2, 1 weeks before harvest (WBH), and treated with 0 or $1{\mu}{\cdot}L^{-1}$ $SmartFresh^{TM}$ at harvest. Fruit was then stored for up to 180 days at $0{\pm}1^{\circ}C$. Fruit fresh weight, Hunter's value a, internal ethylene concentration (IEC), flesh firmness, titratable acidity (TA), and soluble solids content (SSC) in fruit treated with $Harvista^{TM}$ were not different from those of control fruit at harvest. During cold storage, flesh firmness and TA were higher in fruit treated with $250mg{\cdot}L^{-1}$ $Harvista^{TM}$ at 2 and 3 WBH than in control fruit. IEC was 5.5-10.0% lower in fruit treated with $250mg{\cdot}L^{-1}$ $Harvista^{TM}$ at 2 and 3 WBH compared with control fruit as storage duration progressed, while SSC was not affected. Furthermore, flesh firmness, TA, and IEC were affected neither by $Harvista^{TM}$ nor $Harvista^{TM}+SmartFresh^{TM}$ treatments, compared with those fruit quality attributes at harvest. The correlation maps indicated that IEC was negatively correlated with firmness and TA, regardless of $Harvista^{TM}$ application levels. In addition, positive correlations between fruit quality attributes were detected in treatments with $250mg{\cdot}L^{-1}$ $Harvista^{TM}+SmartFresh^{TM}$. Therefore, the results suggest that with a single application of $SmartFresh^{TM}$, a higher level of $Harvista^{TM}$ application would help in retention of fruit quality attributes during cold storage.

본 연구는 수확 전 수체살포용 1-MCP($Harvista^{TM}$)와 수확 후 훈증용 1-MCP($SmartFresh^{TM}$) 처리가 '후지' 사과의 품질과 저장성에 미치는 영향을 구명하고자 실시하였다. $Harvista^{TM}$ 처리는 수확 1, 2, 3주전 0, 95, 125, $250mg{\cdot}L^{-1}$ 농도로 각각 처리하였으며, $SmartFresh^{TM}$ 처리는 수확 1일 후 밀폐된 공간에서 $1{\mu}L{\cdot}L^{-1}$의 농도로 18시간동안 처리하였다. 과실저장은 $0{\pm}1^{\circ}C$ 조건에서 180일간 저장하였다. $Harvista^{TM}$ 처리에 따른 수확 시 과실품질을 보면 과중, 과피 적색도, 내생에틸렌 발생량, 경도, 산 및 가용성 고형물 함량은 무처리구와 차이가 없었다. 저온저장동안 '후지' 사과의 품질변화를 보면 $Harvista^{TM}$$250mg{\cdot}L^{-1}$의 농도로 2, 3주전에 처리한 과실이 무처리구에 비하여 과실 경도 및 산 함량이 더 높게 유지되었으며, 내생에틸렌 발생량도 무처리구에 비하여 5.5-10.0% 수준으로 현저히 낮았다. 그리고 저장기간 중 가용성고형물 함량은 차이를 보이지 않았다. $Harvista^{TM}$ 단독처리와 $Harvista^{TM}+SmartFresh^{TM}$ 혼용처리구는 경도, 산 함량, 내생에틸렌 발생량 모두 저장 180일 후에도 수확 시와 큰 차이를 보이지 않아 과실품질이 유지되었다. 요인간 상관분석은 $Harvista^{TM}$ 처리시 처리농도와 무관하게 내생에틸렌 발생량이 경도 또는 산 함량과 부의 상관관계를 나타냈다. 그리고 $Harvista^{TM}+SmartFresh^{TM}$ 혼용처리 시 $Harvista^{TM}$ $250mg{\cdot}L^{-1}$$SmartFresh^{TM}$ 처리가 변수간 정의 상관관계를 나타내었다. 따라서, 수확 후 $SmartFresh^{TM}$처리에 의한 과실품질유지 효과와 함께, 고 농도의 $Harvista^{TM}$처리 또한 저온저장 중 과실품질 유지에도 큰 효과를 보였다.

Keywords

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