Journal of Mushroom (한국버섯학회지)

The Korean Society of Mushroom Science (한국버섯학회)
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Effect of UV-B irradiation time on storage characteristics of the fruiting body of Heuktari

UV-B조사 시간에 따른 흑타리 자실체의 저장 특성

  • Park, Tae-Min (Department of plant Resources, Kongju National University) ;
  • Park, Youn-Jin (Kongju National University Legumes Green Manure Resource Center) ;
  • Oh, Tae-Seok (Department of plant Resources, Kongju National University) ;
  • Cho, Young-Koo (Department of plant Resources, Kongju National University) ;
  • Jang, Myoung-Jun (Department of plant Resources, Kongju National University)
  • 박태민 (공주대학교 식물자원학과) ;
  • 박윤진 (두과녹비자원연구센터) ;
  • 오태석 (공주대학교 식물자원학과) ;
  • 조용구 (공주대학교 식물자원학과) ;
  • 장명준 (공주대학교 식물자원학과)
  • Received : 2021.11.23
  • Accepted : 2021.12.17
  • Published : 2021.12.31
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Abstract

This experiment was conducted to investigate the changes in freshness parameters and determine the optimal UV-B irradiation conditions for each storage period for Heuktari, an oyster mushroom cultivar, grown under LED lightNo significant changes were observed in the CO2 and O2 content until day 12 of storage; however, after day 15, the CO2/O2 ratios were higher in the UV-treated groups than in the untreated groups. No color difference was observed between the UV-treated and untreated groups. In all UV-treated groups, hardness decreased over time; however, the group irradiated for 15 minutes showed higher hardness values than those of the untreated group. The UV-irradiated group showed higher ergosterol content than did the untreated group, and scanning electron microscopy revealed that mushroom cell wall destruction increased with increased UV treatment time. Overall, these findings confirmed that UV-B irradiation increased the ergosterol content of Heuktari but decreased its freshness and negatively impacted other storage characteristics.

흑타리 UV-B조사시간에 따른 저장특성과 에르고스테롤함량의 변화를 조사하였다. 중량감모율은 조사시간이 길어질수록 중량의 감소율이 증가하는 경향을 보였다. CO2/O2 조성의 경우 UV-B 조사시간이 길어질수록 증가하는 것으로 나타났다. 𝚫E는 Lightness와 Redness에서 30분처리와 무처리에서 큰 차이를 보이지 않았지만, Yellowness에서 무처리가 15분처리보다 2.7, 30분처리보다 1.6 높은 값이 나온 것을 확인할 수 있다. 경도에서도 마찬가지로 UV-B 조사시간이 길어지면 빠르게 물러지는 것을 확인할 수 있다. 에르고스테롤의 함량변화의 경우 30분처리가 무처리보다 약 2배 정도 높은 값이 나온 것을 볼 수 있었다. 전자현미경으로 관찰한 결과 UV-B조사시간이 길어지면 길어질수록 세포벽이 부서지는 경향을 나타냈으며, 30분처리에 비해서 15분처리의 세포벽이 좀 더 양호한 것을 볼 수 있었다. 전체적인 결과로 보았을 때 UV-B 조사시간이 길어지면 저장특성이 나빠지며, 세포벽이 파괴되지만, 에르고스테롤의 함량이 증가하는 것으로 보인다. 하지만, 30분처리의 저장특성에 비해 15분처리의 저장특성이 높았으며, 에르고스테롤의 함량 차이가 크게 나지 않는 것으로 확인되었다. 따라서, UV-B 30분처리를 하게 되면 에르고스테롤의 함량은 증가하지만, 중량의 감소율이 증가하며, 색차값이 달라지며, 세포벽이 많이 부서지는 경향을 나타내었다. 추후 UV-B의 적정조사시간에 대한 추가적인 연구가 필요할 것으로 판단된다.

Keywords

Acknowledgement

이 논문은 2021년 공주대학교 학술연구지원사업의 연구지원에 의하여 연구 되었음

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