자생 양치식물 지상부와 근경 메탄올 추출물의 항산화 효과

Antioxidant Effects of the Methanol Extracts Obtained from Aerial Part and Rhizomes of Ferns Native to Korea

  • 신소림 (충북대학교 응용생명환경학부 원예과학과) ;
  • 이철희 (충북대학교 응용생명환경학부 원예과학과)
  • Shin, So-Lim (Dept. of Horticultural Science, Chungbuk Nat'l Univ.) ;
  • Lee, Cheol-Hee (Dept. of Horticultural Science, Chungbuk Nat'l Univ.)
  • 투고 : 2009.10.12
  • 심사 : 2010.01.22
  • 발행 : 2010.02.28

초록

메탄올을 용매로 12종 양치식물의 지상부와 근경의 건조시료를 초음파추출하여 페놀성 물질 함량 및 DPPH와 ABTS radical 소거능을 측정하였다. 총 폴리페놀의 함량은 건조시료 1 g에 $2.793{\sim}140.014\;mg{\cdot}g^{-1}$, 생시료 1 g에 $0.779{\sim}49.579\;mg{\cdot}g^{-1}$으로 다양하게 나타났으며, 넉줄고 사리와 더부살이고사리의 지상부에서 총 폴리페놀 함량이 높았다. 총 플라보노이드 함량은 건조시료 1 g에 $2.559{\sim}34.909\;mg{\cdot}g^{-1}$, 생시료 1g에 $0.714{\sim}11.487\;mg{\cdot}g^{-1}$으로 나타났다. 건조시료 중에는 관중 지상부, 생시료 중에는 더 부살이고사리의 지상부에서 총 플라보노이드 함량이 가장 높았다. 총 폴리페놀은 지상부보다 근경에 많이 함유된 경향을 보였으나, 총 플라보노이드는 지상부에 많았다. DPPH와 ABTS radical 소거능은 지상부보다 근경 추출물에서 높게 나타났다. 총 폴리페놀은 지상부보다 근경에 많이 함유된 경향을 보였으나, 총 플라보노이드는 지상부에서 함량이 많았다. DPPH와 ABTS radical 소거능은 지상부보다 근경 추출물에서 높게 나타났다. DPPH radical 소거능과 ABTS radical 소거능 모두 나도히초미 근경 추출물에서 가장 우수하였다. 그러나 시료의 수분함량과 추출수율을 고려하여 $RC_{50}$을 나타내는데 필요한 생시료의 양을 계산한 결과, 나도히초미 근경보다는 더부살이고사리 지상부가 DPPH와 ABTS radical 소거용 식물소재로 적합하였다. 양치식물의 추출물은 특히 ABTS radical 소거능이 매우 우수하였으며, 가지고비고사리 추출물을 제외한 대부분의 시료가 ascorbic acid 또는 BHT와 유사한 소거활성을 보였다.

Phenolic compound contents and scavenging activity on DPPH and ABTS radicals in twelve fern species were studied by analysing ultrasonification extraction of dried aerial parts and rhizomes using methanol solvent. Total polyphenol content ranged from 2.97 to 140.1 mg per 1 g dried sample and 0.80 to $49.58\;mg{\cdot}g^{-1}$ fresh sample. Highest polyphenol content was obtained with aerial part of Davallia mariesii and Polystichum lepidocaulon. Total flavonoid content of dried sample was $2.56{\sim}34.91\;mg{\cdot}g^{-1}$ and fresh sample $0.71{\sim}11.49\;mg{\cdot}g^{-1}$. Higher flavonoids were obtained with dried aerial part of Dryopteris crassirhizoma, but with fresh aerial part of P. lepidocaulon. In general, total polyphenol content was higher in rhizomes, except in case of total flavonoid. Scavenging effects on DPPH and ABTS radicals was higher with rhizome extracts compared to aerial parts. The rhizome of Polystichum polyblepharum showed highest effects on both radicals. However, the amount of fresh sample for $RC_{50}$ with consideration of water content and extraction yield. P. lepidocaulon aerial part was more advantageous than P. polyblepharum rhizome. All the fern extracts except for the Coniogramme japonica extract demonstrated superior scavenging effects on ABTS radicals, being similar activity of ascorbic acid and BHT.

키워드

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