Antimicrobial Activities of Extracts from Several Native and Exotic Plants in Korea

수 종의 한국자생식물과 귀화식물 추출액이 토양미생물에 미치는 항균활성

  • Kim, Yong-Ok (School of Biological Sciences, Seoul National University) ;
  • Lee, Eun-Ju (School of Biological Sciences, Seoul National University) ;
  • Lee, Ho-Joon (Department of Biological Sciences, College of Natural Science)
  • 김용옥 (서울대학교 자연과학대학 생명과학부) ;
  • 이은주 (서울대학교 자연과학대학 생명과학부) ;
  • 이호준 (건국대학교 이과대학)
  • Published : 2000.10.01

Abstract

The soil pH favored by several native plants in Korea ranges 5.33∼7.20, while a more acidic range of pH 3.95∼6.10 is acceptable to exotic plants. Ethanol extracts of native and exotic plants in Korea were investigated for antimicrobial activity against Bacillus sphiaericus 2362, Bacillus thuringiensis var. subtilis and Bacillus thuringiensis var. cereus and Actinomycetes. Higher antimicrobial activity was observed from the extract of exotic plants than those of native plants. The ethanol extract of Ambrosia artemisiifolia var. elatior was observed to have the highest antimicrobial activity against 4 species of soil microbes. Especially, antimicrobial activity of Ambrosia artemisiifolia var. elatior showed the largest clear zone of 48mm in Actinomycetes. Larger clear zone was formed in the order of caffeic acid, benzoic acid and ρ -coumaric acid among the nine chemical compounds. Accordingly, the antimicrobial activity of Ambrosia artemisiifolia var elatior against Actinomycetes was found to be due to the synergetic effect of chemical compounds.

수 종의 한국자생식물과 귀화식물의 서식지 토양 pH를 측정한 결과 자생식물의 토양 pH범위는 5.33∼7.20인 반면 귀화식물의 토양 pH는 3.95∼6.10으로 자생종에 비하여 귀화종의 토양 pH가 낮았다. 자생식물과 귀화식물의 에탄올 추출액이 토양미생물인 Bacillus sphiaericus 2362, Bacillus thuringiensis var. subtilis, Bacillus thuringiensis var. cereus, Actinomycetes에 미치는 항균활성 은 자생식물보다 귀화식물이 전반적으로 활성이 높게 나타났다. 돼지풀의 추출액은 4개의 균주 모두에서 항균활성이 크게 나타났고 특히 방선균에서 clear zone 이 48mm로 가장 크게 형성되었다. 8종류의 phenolic compound와 benzoic acid의 항균활성은 caffeic acid가 각 균주 에서 clear zone을 가장 크게 형성하였고 다음은 benzoic acid, ρ-coumaric acid의 순이였다. 즉 방선균에 대한 돼지풀의 항균활성은 phenolic compound들 간의 상승효과에 의하여 형성된 것임을 알 수 있었다.

Keywords

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