Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effect of Application of Rice Bran Extract on Quality of Agaricus bisporus during Storage

쌀겨추출물을 적용한 양송이의 저장 중 품질 변화

  • Park, Hye Jin (Department of Food & Nutrition, Duksung Women's University) ;
  • Kim, Gun-Hee (Department of Food & Nutrition, Duksung Women's University)
  • 박혜진 (덕성여자대학교 식품영양학과) ;
  • 김건희 (덕성여자대학교 식품영양학과)
  • Received : 2013.11.17
  • Accepted : 2014.08.25
  • Published : 2014.12.31
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Abstract

Postharvest browning of mushroom (Agaricus bisporus) reduces the shelf life of harvested mushrooms. Here, mushrooms were dipped in various solutions (distilled water; DW, 0.25% rice bran extract; RB, 0.1% ascorbic acid; AA, RB + AA) for 3 min. After air-drying at room temperature, the dipped mushrooms were packaged in a polypropylene (PP) films and stored at 4 or $15^{\circ}C$. The quality changes of mushrooms were measured in terms of color, gas composition, firmness, and sensory evaluation during storage. Rice bran extract was measured for total polyphenol content, total flavonoid content, DPPH, ABTS radical scavenging, chelating activity and PPO inhibition activity. No difference in firmness were found in the mushroom samples regardless of dipping solution or storage temperature. At both 4 and $15^{\circ}C$ storage temperatures, RB + AA solution-dipped samples showed the highest L value and lowest delta E value. During the storage period, sensory evaluation showed that overall acceptability of mushrooms treated with RB and RB + AA solution was higher than that of the untreated mushrooms. Total polyphenol and flavonoid contents of 0.25% rice bran extract were $36.42mg\;GAE{\cdot}g^{-1}$ and $4.85mg\;QE{\cdot}g^{-1}$, respectively. The DPPH and ABTS radical scavenging activity of 0.1% ascorbic acid was higher than that of 0.25% rice bran extract. The highest copper ($Cu^{2+}$) chelating activity was found in the 0.25% rice bran extract. The PPO inhibition activity of 0.1% ascorbic acid was higher than that of 0.25% rice bran extract. Our results suggest that 0.25% rice bran extract with 0.1% ascorbic acid is effective anti-browning agent for maintaining quality of Agaricus bisporus during storage.

양송이의 수확 후 갈변 등의 품질변화는 상품적 가치를 떨어뜨리는 요인으로 수확 후 품질관리가 중요하다. 양송이에 증류수(DW), 쌀겨추출물(RB), ascorbic acid(AA), 쌀겨 추출물 및 ascorbic acid의 병용처리(RB + AA)를 적용하여 PP film으로 포장한 후 4 및 $15^{\circ}C$에 저장하면서 포장 내 기체조성, 표면색, 경도 및 관능적 품질변화를 조사하였으며, 쌀겨추출물에 대한 항산화 성분(총 페놀함량 및 플라보노이드 함량), 항산화 활성(DPPH, ABTS 라디칼 소거능), 항갈변 효과(구리 킬레이팅, PPO 저해 활성)를 확인하였다. 저장 온도에 상관없이 경도와 포장 내 산소가스 농도는 처리구별 차이가 없었다. 저장 중 양송이의 색변화는 RB + AA 처리구의 L값이 가장 높았으며, ${\delta}E$값은 RB + AA 처리구 및 RB 처리구가 가장 낮았다. 저장 기간 동안 관능평가에 있어서 색, 향 및 전반적 기호도는 RB 및 RB + AA 처리구가 가장 높은 값을 유지하였다. 쌀겨추출물 0.25%에 대한 총 폴리페놀 및 플라보노이드 함량은 각 $36.42mg\;GAE{\cdot}g^{-1}$과 $4.85mg\;QE{\cdot}g^{-1}$으로 나타났다. DPPH와 ABTS 라디칼 소거능에서는 모두 ascorbic acid의 활성이 쌀겨추출물에 비해 높았고, 구리($Cu^{2+}$) 킬레이팅 활성에서는 쌀겨추출물의 활성이 ascorbic acid보다 높았다. 그러나, PPO 저해활성에서는 ascorbic acid가 더 높은 값으로 나타났다. 본 연구결과, 전반적으로 쌀겨추출물 및 ascorbic acid의 병용처리가 양송이의 저장 중 일어나는 갈변을 효과적으로 저해하였으며, 이러한 결과는 쌀겨추출물이 경제적인 천연갈변저해제로서 활용될 수 있음을 시사한다.

Keywords

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