Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Analysis of Functional Components of Leaves of Different Mulberry Cultivars

뽕잎 품종별 기능성 성분 분석

  • 채주영 (대구가톨릭대학교 식품영양학과) ;
  • 이준영 (대구가톨릭대학교 식품영양학과) ;
  • 황인승 (영천양잠농업협동조합) ;
  • 황보득 (영천양잠농업협동조합) ;
  • 최필환 (영천양잠농업협동조합) ;
  • 이완주 (농촌진흥청 농업과학기술원 잠사곤충부) ;
  • 김진원 (농촌진흥청 농업과학기술원 잠사곤충부) ;
  • 김선여 (경희대학교 동서의학대학원) ;
  • 최상원 (대구가톨릭대학교 식품영양학과)
  • Published : 2003.02.01
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Abstract

Quantification of functional components, such as ［l -deoxynojirimycin (DNJ), ${\gamma}$-aminobutyric acid (GABA) and flavonoids］ of four different cultivars (YK-209, Cheongil, Yongchon and Kaeryang) and parts (upper, middle and lower) of mulberry leaves harvested in different areas and periods was performed by HPLC to select the best Quality of mulberry leaf suitable for manufacture of functional foods. Among four mulberry cultivars, YK-209 mulberry leaf had the highest DNJ, GABA and flavonoids levels. YK-209 mulberry leaf harvested in "Yeongcheon" area had greater DNJ, GABA and flavonoid contents than those harvested in "Sangju" area. Four major flavonoids of mulberry leaf were rutin, isoquercitrin, kaempferol-3-Ο-rutinoside, astragalin, and their levels varied greatly with cultivars. YK-BO9 mulberry leaf had the highest flavonoids content among four cultivars. DNJ, GABA and flavonoid contents of young YK-209 mulberry leaf were relatively higher in the upper part than those in the middle and lower parts. Additionally, levels of DNJ, GABA and flavonoids were higher in mulberry leaves harvested in the eariler growing season (May) than in the late growing seasons (June and August) . Particularly, among four flavonoids, rutin content had the highest in the mulberry leaf harvested in May, while isoquercitrin content did the highest in the mulberry leaf harvested in June and August. These results suggest that YK-209 mulberry leaf having high amount of functional components, such as DNJ, GABA and flavonoids, may be useful as potential source of beverages and tablets.verages and tablets.

본 연구는 뽕잎을 이용한 고부가가치의 기능성식품의 제조에 적합한 뽕잎 품종을 선별하고자 품종별(YK-209, Cheong il, Yongchon and Kaeryang), 산지별(영천 및 상주), 부위별(상위, 중위 및 하위엽) 및 생육시기별(5월, 6월 및 8월)에 따른 뽕잎의 기능성 지표물질인 DNJ, GABA및 flavonoid의 함량을 HPLC로 정량하였다. 4가지 뽕잎 중 YK-209 뽕잎의 기 능성 물질 (DNJ, GABA 및 flavonoid) 함량이 가장 높았다. 그리고 YK-209 뽕잎으로부터 분리된 4가지 flavonoid 중 rutin 함량이 가장 높았으며, 그 다음으로 isoquercitrin>kaempferol-3-Ο-rutinoside＞astragalin 순으로 나타났으나 그 외 3가지 뽕잎에서는isoquercitrin의 함량이 가장 높았고 그 다음으로 rutin이 차지 하였으나 품종별, 산지별, 부위별 및 성장시기별에 따라 flavonoid구성성분의 함량이 다소 차이가 있었다. 영천지역에서 수확한 YK-209뽕잎의 3가지 기능성물질의 함량이 상주에서 수확한 뽕잎보다 그 함량이 높았다. 한편, YK-209 뽕잎의 부위 중 상위엽이 중위 및 하위엽보다 3가지 기능성물질의 함량이 높았다. 끝으로YK-209뽕잎의 성장시기 중 5월에 수확한 것이 6월 및 8월에 수확한 뽕잎보다 기능성물질의 함량이 높았다. 이러한 연구결과를 미루어 볼 때 3가지 기능성 성분함량이 높은 YK-209 뽕잎(용천뽕과 개량뽕을 교배하여 얻은 것)의 5월산 상위엽을 향후 뽕잎의 이용한 기능성식품의 제조용 원료로 활용할 수 있을 것으로 기대된다.

Keywords

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