Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Changes in physicochemical components of Astragalus membranaceus fermented with Phellinus linteus

상황버섯균 접종 황기의 배양 중 이화학적 성분변화

  • Jang, Yeon-Jeong (Department of Agro- food Resources, National Insitute of Agricultural Science, RDA) ;
  • Kim, Eun-Ju (Department of Agro- food Resources, National Insitute of Agricultural Science, RDA) ;
  • Kim, So Young (Department of Agro- food Resources, National Insitute of Agricultural Science, RDA) ;
  • Lee, Yun Hye (Mushroom Research Institute, Gyeonggi Province, ARES) ;
  • Park, Shin-Young (Department of Agro- food Resources, National Insitute of Agricultural Science, RDA)
  • 장연정 (농촌진흥청 국립농업과학원 농식품자원부 발효식품과) ;
  • 김은주 (농촌진흥청 국립농업과학원 농식품자원부 발효식품과) ;
  • 김소영 (농촌진흥청 국립농업과학원 농식품자원부 발효식품과) ;
  • 이윤혜 (경기도농업기술원 버섯연구소) ;
  • 박신영 (농촌진흥청 국립농업과학원 농식품자원부 발효식품과)
  • Received : 2016.08.23
  • Accepted : 2016.09.26
  • Published : 2016.10.30
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Abstract

This study analyzed the changes in physicochemical components of Astragalus membranaceus (AM) fermented with Phellinus linteus. Moisture content, pH, total acidity, total reducing sugar content, extraction yield, free sugar content, free amino acid and isoflavonoid (calycosin, formononetin) were investigated. The moisture content was increased during fermentation with Phellinus linteus. The pH level increased while the total acidity significantly decreased during fermentation. The reducing sugar content were in the range of 0.32~0.61%. The extraction yield using water was higher than that using 80% ethanol. The major free sugars were identified as glucose, fructose, sucrose and the content of free sugars decreased through fermentation. However, the glucose and sucrose contents of the water extracts were increased. In addition, the free amino acid increased significantly during fermentation. Finally, calycosin and formononetins contents in water extracts of after 30 days of AM fermentaion with Phellinus linteus were (3.91 mg/100 g) and (1.38 mg/100 g), respectively. These results suggest that fermentation with Phellinus linteus could be used to increase the bioactivity of AM. The mycelium-fermented AM could be a valuable source of functional material and edible resource for industry.

본 연구에서는 상황버섯 균사체를 황기에 배양하여 이용성 및 기능성을 증진시킨 식품 및 소재를 개발하기 위한 연구의 일환으로 기초연구를 실시하였다. 수분함량, pH, 산도 및 환원당을 측정함으로서 균사체 배양 황기의 변화를 관찰한 결과 수분함량 및 pH는 균사체 배양기간이 지남에 따라 유의적으로 증가하는 경향을 보인 반면 산도는 시간이 지남에 따라 오히려 대체적으로 감소하는 경향을 나타냈다. 환원당 함량 측정결과 배양 30일차 황기가 대조구에 비해 약 2배 증가한 0.61 g/100 g으로 가장 높은 함량을 나타냈고, 배양 10, 20일차는 각각 0.36, 0.42 g/100 g 으로 대조구보다 다소 증가한 함량을 나타냈다. 추출용매에 따른 균사체 배양 황기의 추출수율 결과 열수추출물이 40.18~41.99% 범위로 80% 에탄올 추출물의 28.70~33.18%보다 높게 나타났다. 유리당 함량 분석결과 80% 에탄올 추출물 및 열수추출물의 모든 실험구에서 배양기간이 지남에 따라 fructose 및 sucrose의 함량이 감소하는 경향을 나타내었다. 유리아미노산은 필수아미노산 8종을 포함해서 총 17종이 검출되었으며 상황버섯균 배양 황기의 주요 아미노산은 arginine, alanine, aspartic acid 및 valine 으로 확인되었다. 아미노산의 총 함량은 배양기간이 지남에 따라 20일차까지 소폭 증가 한 뒤 30일차 감소하였으며, 그 중 배양 20일차가 121.47 mg%으로 배양일 중 가장 증가한 함량을 보였다. 상황버섯균 배양 황기의 성분 함량을 분석한 결과 열수 추출물의 배양 30일차에서 calycosin-7-o-${\beta}$-d-glucoside은 3.30 mg/100 g, ononin은 2.85 mg/100 g으로 대조구에 비해 각각 5배, 5.1배 감소하였으며, calycosin 및 formononetin 함량은 3.91 mg/100 g, 1.38 mg/100 g으로 대조구에 비해 각각 8.7배와 7.7배 증가한 함량으로 다른 배양일 보다 유의적으로 높은 함량을 나타내었다. 이는 황기에 존재하는 배당체인 calycosin-7-o-${\beta}$-d-glucoside 및 ononin (Formononetin-7-O-${\beta}$-d-glucoside) 성분이 aglycon 형태로 전환이 된 것으로 사료된다. 이러한 분석결과는 상황버섯 균사체 배양을 통한 황기의 이화학적특성 변화를 초래하여 기능성을 증대 시킬 수 있음을 확인하였고, 추후 긍정적 영향을 미칠 수 있는 천연소재로서 산업적 활용이 가능할 것이라 생각된다.

Keywords

References

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  1. 유산균으로 발효한 황기 잎 추출물의 이화학적 특성 및 항산화 활성 vol.28, pp.6, 2020, https://doi.org/10.7783/kjmcs.2020.28.6.428