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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Proximate Compositions and Biological Activities of Lactuca indica L. Seonhyang and Wild Species Depending on Harvesting Time

왕고들빼기 선향과 야생종의 수확시기별 일반성분 및 생리활성

  • Kwon, Hye-Jeong (Agro-food Research Institute, Gangwon Provincial Agricultural Research & Extention Services) ;
  • Jeong, Eun-Kyoung (Agro-food Research Institute, Gangwon Provincial Agricultural Research & Extention Services) ;
  • Jeong, Hye-Jeong (Agro-food Research Institute, Gangwon Provincial Agricultural Research & Extention Services) ;
  • Kim, Si-Chang (Agro-food Research Institute, Gangwon Provincial Agricultural Research & Extention Services) ;
  • Heo, Nam-Kee (Agro-food Research Institute, Gangwon Provincial Agricultural Research & Extention Services) ;
  • No, Hee-Sun (Specialty Crops Research Institute, Gangwon Provincial Agricultural Research & Extention Services)
  • 권혜정 (강원도농업기술원 농식품연구소) ;
  • 정은경 (강원도농업기술원 농식품연구소) ;
  • 정혜정 (강원도농업기술원 농식품연구소) ;
  • 김시창 (강원도농업기술원 농식품연구소) ;
  • 허남기 (강원도농업기술원 농식품연구소) ;
  • 노희선 (강원도농업기술원 특화작물연구소)
  • Received : 2014.11.14
  • Accepted : 2015.02.13
  • Published : 2015.03.31
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Abstract

We investigated the effect of harvesting time on the proximate compositions and biological activities of Lactuca indica L. Seonhyang and wild species. The highest moisture content (91%) was obtained from Seonhyang harvested in June. The wild species harvested in August showed the highest crude protein (4.8%) and crude fiber contents (2.7%). Potassium contents were 626~684 mg/100 g, and no significant difference in harvesting time was observed between Seonhyang and wild species. Calcium and phosphate contents of Seonhyang leaves harvested in August were highest (350 mg/100 g and 123 mg/100 g, respectively). The highest total polyphenol and total flavonoid contents were observed for wild species harvested in June (60 mg/g and 126 mg/g, respectively). Ethanol extracts of Seonhyang and wild species leaves harvested in June showed the highest DPPH radical scavenging activity (95%). ${\alpha}$-Amylase inhibitory activity was highest (94.8%) in water extract of Seonhyang leaves harvested in July. Nitric oxide production inhibitory activity was $14.3{\mu}M$ in ethanol extracts of Seonhyang and $16.8{\mu}M$ in ethanol extracts of wild species harvested in June. Calcium content and ${\alpha}$-amylase inhibitory activity of Seonhyang leaves were greater than those of wild species leaves. These results suggest that Seonhyang leaf can be used to develop processed foods.

왕고들빼기 신품종 선향과 야생종의 수확시기별 일반성분, 무기질, 항산화, 항당뇨, 항염 효과를 측정하였다. 수분 함량은 6월 수확된 선향 잎이 90.5%로 가장 높았으며, 8월 수확된 야생종에서 단백질은 4.8%, 조섬유는 2.7%로 가장 높았다. 칼륨은 선향과 야생종 잎에서 626~684 mg/100 g으로 수확시기별 큰 차이가 없었다. 칼슘은 8월 수확 선향 잎에서 350 mg/100 g으로 가장 높았다. 인은 8월 수확 야생종에서 123 mg/100 g으로 가장 높았다. 6월 수확된 야생종 잎에서 총 폴리페놀은 59.8 mg/g, 총 플라보노이드는 125.8 mg/g으로 가장 높았다. DPPH radical 소거 활성은 6월 수확된 선향과 야생종 잎의 에탄올 추출물에서 약 94%로 가장 높았다. ${\alpha}$-Amylase 저해 활성은 7월에 수확된 선향 잎의 물 추출물에서 94.8%로 가장 높았다. NO 생성 저해 활성은 6월 수확된 선향과 야생종 잎의 에탄올 추출물에서 각각 14.3, $16.8{\mu}M$로 LPS 단독처리에 비해 NO 생성 저해 효과를 보였다. 따라서 선향 잎은 야생종에 비해 칼슘 함량과 ${\alpha}$-amylase 저해 활성이 높았으며, 이러한 선향 잎의 영양 기능성을 활용한 다양한 가공품 개발이 가능할 것으로 보인다.

Keywords

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