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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antioxidant Compounds and Antioxidant Activities of Sweet Potatoes with Cultivated Conditions

재배조건에 따른 고구마의 항산화성분 및 항산화활성

  • Woo, Koan-Sik (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Seo, Hye-In (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Yong-Hwan (Crop Environment Research Div., National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Hyun-Young (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Ko, Jee-Yeon (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Song, Seuk-Bo (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Jae-Saeng (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Jung, Ki-Yuol (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Nam, Min-Hee (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Oh, In-Seok (Dept. of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Jeong, Heon-Sang (Dept. of Food Science and Technology, Chungbuk National University)
  • 우관식 (국립식량과학원 기능성작물부) ;
  • 서혜인 (국립식량과학원 기능성작물부) ;
  • 이용환 (국립식량과학원 작물환경과) ;
  • 김현영 (충북대학교 식품공학과) ;
  • 고지연 (국립식량과학원 기능성작물부) ;
  • 송석보 (국립식량과학원 기능성작물부) ;
  • 이재생 (국립식량과학원 기능성작물부) ;
  • 정기열 (국립식량과학원 기능성작물부) ;
  • 남민희 (국립식량과학원 기능성작물부) ;
  • 오인석 (국립식량과학원 기능성작물부) ;
  • 정헌상 (충북대학교 식품공학과)
  • Received : 2012.01.03
  • Accepted : 2012.01.27
  • Published : 2012.04.30
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Abstract

Effects of cultivated conditions on antioxidant compounds and antioxidant activities of sweet potatoes (Ipomoea batatas (L.) Lam) were determined. The cultivated variety was Shinyulmi, and they were cultivated in a conventional culture, successful cropped hairy vetch culture, successful cropped barley cultivation, successful cropped rye cultivation, successful cropped mix-seeding of hairy vetch and barley, successful cropped mix-seeding of hairy vetch and rye, and not fertilizer. The brix degree, moisture, protein, and ash content of the sweet potatoes did not significantly change with the cultivated conditions. However amylose, total dietary fiber, and mineral content had significant changes. The total polyphenol, flavonoid, and tannin content of the methanolic extracts of the sweet potato's pericarp showed significant differences from cultivated conditions, however, the sweet potato's sarcocarp did not significantly change. The highest DPPH and ABTS radical scavenging activities of the methanolic extracts of the sweet potatoes were 958.81 and 663.53 mg TE/100 g in the sweet potato's pericarp on the successful cropped hairy vetch culture. Generally, there was a difference in antioxidant compound content and radical scavenging activity on the methanolic extract of sweet potato with cultivated conditions.

친환경재배기술의 하나인 녹비작물을 이용한 후작으로 고구마를 재배하여 수확한 고구마의 이화학적 특성을 분석하여 고구마 친환경재배에 적합한 조건 확립을 위한 기초자료로 활용하고자 하였다. 녹비작물 재배 후 후작으로 재배한 고구마에 대한 당도, 수분, 단백질 및 회분 함량은 재배조건에 따라 유의적인 차이를 보였으며(p<0.05), 아밀로스 및 총 식이섬유 함량은 유의적인 차이를 보이지 않았다. 칼륨, 칼슘, 마그네슘, 나트륨, 알루미늄 및 인산 등의 무기성분 함량은 재배조건에 따라 유의적인 차이를 보이는 것으로 나타났다(p<0.05). 녹비작물 재배 후 후작으로 재배한 고구마를 과피와 과육으로 구분하여 메탄올로 추출하여 총 폴리페놀, 플라보노이드, 탄닌 등의 항산화성분 함량을 분석한 결과 과피의 경우 유의적인 차이를 보였으나(p<0.05), 과육은 차이를 보이지 않는 것으로 나타났다. 가장 높은 함량을 보인 처리구는 헤어리베치 후작으로 재배한 고구마로서 과피 추출물에서 각각 5.05 mg GAE/g sample, 3.86 mg CE/g sample 및 3.92 mg TAE/g sample의 함량을 나타내었다. DPPH 및 ABTS radical 소거활성을 표준물질인 Trolox와 비교하여 측정한 결과 과피의 경우 헤어리베치 후작으로 재배한 고구마가 각각 958.81 및 663.53 mg TE/100 g으로 유의적으로 가장 높은 활성을 보였으며(p<0.05), 비료를 주지 않은 고구마가 각각 546.47 및 438.08 mg TE/100 g으로 낮은 활성을 보였다. 과육의 경우는 각각 132.01~189.83 및 139.43~201.02 mg TE/100 g의 범위에서 큰 차이를 보이지 않는 것으로 나타났다. 이상의 결과에서 헤어리베치를 전작물로 재배하였을 때 수확된 고구마의 높은 항산화성분 함량과 항산화활성을 보이는 것으로 나타났다.

Keywords

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