Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Nutritional quality of Peucedanum japonicum Thunb. leaves in relation to ripening time, growing condition and blanching

재배조건, 수확시기 및 열처리에 따른 갯기름나물의 영양성분 변화

  • Jin, Yong-Xie (Department of Agrofood Resources, National Academy of Agricultural Science(NAAS), Rural Development Administration(RDA)) ;
  • Cho, Young-Sook (Department of Agrofood Resources, National Academy of Agricultural Science(NAAS), Rural Development Administration(RDA)) ;
  • Choi, Youngmin (Department of Agrofood Resources, National Academy of Agricultural Science(NAAS), Rural Development Administration(RDA))
  • 김영섭 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 조영숙 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과) ;
  • 최용민 (농촌진흥청 국립농업과학원 농식품자원부 기능성식품과)
  • Received : 2014.09.16
  • Accepted : 2014.11.03
  • Published : 2014.12.30
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Abstract

This work aimed to investigate the changes in the nutrient contents and antioxidant activity of Peucedanum japonicum Thunb. by ripening stage, growing condition, and blanching. The crude protein content of the young leaves (3.6~4.3%) was higher than that of the mature leaves (3.1~3.9%). Higher calcium contents were observed in the greenhouse-cultivated samples (225.9~259.2 mg/100 g) compared to the field-cultivated samples (178.5~199.5 mg/100 g). The vitamin C and folate contents (18.1~83.8 and 175.8~220.2 mg/100 g, respectively) of the field-cultivated samples were significantly (p<0.05) higher than those of the greenhouse-cultivated samples (13.1~57.7 and 133.0~148.8 mg/100 g, respectively). The growing condition and blanching were significant factors affecting the changes in the vitamin and polyphenol contents. The ${\beta}$ carotene contents of the blanched samples increased 2.6-fold compared to those of the raw samples. The total polyphenol contents (10.2~17.1 mg/g extract) and DPPH radical scavenging activity ($IC_{50}=2.0{\sim}3.0mg/ml$) of the blanched samples were significantly (p<0.05) higher than those of the raw samples (1.8~4.3 and $IC_{50}=16.2{\sim}21.1mg/ml$, respectively).

본 연구에서는 재배조건(하우스재배, 노지재배), 수확시기(어린잎, 성잎) 열처리에 따른 영양성분 및 항산화활성의 변화를 비교 분석하여 국가표준성분표 발간을 위한 기초자료로 활용하고자 하였다. 일반성분 4종(수분, 지질, 회분, 단백질), 무기질 5종(칼슘, 철, 마그네슘, 칼륨, 나트륨), 비타민 3종(비타민 C, 엽산, 베타카로틴)의 영양성분을 분석하였고 폴리페놀 화합물과 DPPH 라디칼 제거능을 각각 측정하였다. 연구결과 일반성분의 경우 시료 간에 유의적인 차이를 나타내지 않았으나 무기질의 경우 Ca, Mg, Na은 하우스 재배가 노지재배 보다 유의적으로 높은 함량을 나타내었다. 비타민함량과 폴리페놀 함량 및 항산화 활성의 경우 수확시기보다는 재배방법과 열처리에 의해 함량변화가 큰 것으로 나타났다. 하우스보다 노지 재배된 갯기름나물의 비타민 C, 엽산, 폴리페놀 화합물과 항산화활성이 증가하였으며 열처리할 경우 비타민 C, 베타카로틴, 폴리페놀 화합물, 항산화활성이 각각 증가하였다. 비타민 C의 기존 보고된 이론과 상이한 결과가 도출되어 다양한 열처리온도와 시간을 적용한 성분 변화 연구가 필요할 것으로 생각된다. 베타카로틴과 폴리페놀 화합물의 열처리에 의한 증가는 산화가수분해 효소의 불활성화와 세포조직의 견고성 저하로 인한 활성물질의 추출 효율증가로 설명될 수 있다. 따라서 나물을 데쳐서 섭취할 경우 미생물 오염방지 등 안전성을 확보할 수 있을 뿐만 아니라 나물 세포조직이 연해져 베타카로틴과 같은 우리 몸에 유익한 성분의 소화흡수율이 증가될 것으로 생각된다.

Keywords

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