한국산 해조류의 어류병원성세균에 대한 항균활성
Antimicrobial activities of Korean marine algae against fish pathogenic bacteria
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참고문헌
초록
본 연구에서는 주요 어병세균인 Staphylococcus sp., Streptococcus sp., E. tarda 및 V. anguillarum에 대한 30 종의 해조류 추출물의 항균활성을 검색하였다. 그 결과, C. officinalis, D. simplex, G. furcata, G. lanceolata 및 G. turuturu의 경우는 그람 양성균인 Staphylococcus sp.에 대하여, 그리고 S. thunbergii 및 P. morrowii 는 그람 음성균인 E. tarda와 V. anguillarum에 대하여 항균활성을 나타냄을 밝혔다. 그 중, 가장 우수한 항균활성을 나타낸 P. morrowii의 항균활성분획물인 90% MeOH 분획물은 E. tarda의 증식을 매우 효과적으로 저해하며, MIC는 1 mg/ml으로 측정되었다. 뿐만 아니라, 다양한 pH 조건하에서도 항균활성이 유지되었으며 분획물의 주요활성 성분은 할로겐 함유 phenol계 화합물일 것으로 추정된다.
Abstract
To obtain antimicrobial algae against fish pathogenic bacteria, we screened 80% methanolic extracts of 30 algae using fish pathogenic bacteria, Staphylococcus sp., Streptococcus sp., Edwardsiella tarda and Vibrio anguillarum. Among them, Corallina officinalis, Dumontia simplex, Gloipeltis furcata, Grateloupia lanceolata and Grateloupia turuturu were effective for growth inhibition of a Gram-positive bacterium, Staphylococcus sp.. Sargassum thunbergii and Polysiphonia morrowii exhibited significant inhibitory effects against the growth of Gram-negative bacteria, both E. tarda and V. anguillarum. Moreover, antimicrobial activity-guided fractionation for P. morrowii extract yielded significantly active 90% methanolic fraction. This fraction significantly inhibited the growth of E. tarda exhibiting a MIC of 1 mg/ml. In addition, its antimicrobial activity was stable under various pH conditions.
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