Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Screening of Antifungal Activities of Plant Extracts against Phytopathogenic Fungi

식물추출물의 식물병원성 곰팡이 포자에 대한 발아억제 활성

  • Park, Sang-jo (Gyeongbuk Agricultural Research and Extension Services) ;
  • Rhu, Young Hyun (Organic Agriculture Research Institute, Gyeongbuk Agricultural Research and Extension Services) ;
  • Bae, Soo Gon (Organic Agriculture Research Institute, Gyeongbuk Agricultural Research and Extension Services) ;
  • Seo, Dong Hwan (Gyeongbuk Agricultural Research and Extension Services)
  • Received : 2017.02.21
  • Accepted : 2017.04.03
  • Published : 2017.08.31
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Abstract

Plant extracts were screened for antifungal activity against major plant pathogens, Botrytis sp., Collectotrichum sp., Alternaria sp. and Cylindrocarpon sp. using 96-well microdilution method. Among the 662 methanol extracts from 401 plant species, 36 extracts showed complete inhibition of spore germination against at least one of four pathogenic fungi. Extracts of Morus alba twig and Sophora flavescens root showed minimum inhibition concentration (MIC) at $1,250{\mu}g/ml$ against Botrytis sp.. Extracts of Chloranthus japonicus root showed MIC at $1,250{\mu}g/ml$ against Collectotrichum sp.. Extracts of Glycyrrhiza uralensis aerial part, Inula helenium root and Menispermum dauricum root showed MIC between 625 and $1,250{\mu}g/ml$ against Alternaria sp.. G. uralensis aerial part and I. helenium root showed MIC at $1,250{\mu}g/ml$ against Cylindrocarpon sp.. Specifically, the extracts of Agrimonia pilosa root, Angelica tenuissima root, Asarum sieboldii root, Campsis grandifolia leaf and twig, Cnidium officinale root, Dictamnus dasycarpus root, G. uralensis aerial part, I. helenium root and M. alba twig completely inhibited spore germination at lower than $5,000{\mu}g/ml$ against all of four pathogenic fungi. Two methanol extracts from G. uralensis aerial part and M. alba twig may used as a candidate to develop into effective disease management materials in plant cultivation.

401종의 식물에서 얻은 메탄올 추출물 662개를 식물 병원성 곰팡이[딸기잿빛곰팡이병균(Botrytis sp.), 고추탄저병균(Colletotrichum sp.), 작약점무늬병균(Alternaria sp.) 및 작약검은뿌리썩음병균(Cylindrocarpon sp.)]에 대한 분생포자의 발아억제 활성을 microdilution assay로 측정하였다. 검정에 사용한 추출물 중에서 36종의 추출물이 1종 이상의 곰팡이에 대하여 억제활성을 보였다. 짚신나물, 고본, 족도리풀, 일천궁, 백선 및 목향의 뿌리, 능소화의 잎가지, 감초의 지상부, 뽕나무의 가지 추출물은 식물의 지상부 조직에서 발병하는 균(Botrytis sp., Colletotrichum sp. 그리고 Alternaria sp.)과 뿌리에 발병하는 균(Cylindrocarpon sp.)의 포자발아를 모두 억제하는 항균활성을 보여 주어 이들 추출물의 항균범위가 넓은 것으로 나타났다. 각각의 곰팡이 대한 추출물의 억제활성을 보면, 뽕나무의 가지와 고삼의 뿌리 추출물은 1,250 mg/L에서 딸기잿빛곰팡이병균의 포자발아를 완전히 억제하였다. 고추탄저병균의 포자발아억제에 가장 강한 추출물은 홀아비꽃대의 뿌리였으며, $1,250{\mu}g/ml$에서 완전히 억제하였다. 작약점무늬병균에 가장 강한 억제활성을 나타낸 추출물은 감초의 지상부였으며, $625{\mu}g/ml$에서 포자의 발아를 100% 억제하였고, 새모래덩굴의 뿌리와 뽕나무 가지 추출물은 $1,250{\mu}g/ml$에서 억제하였다. 작약검은뿌리썩음병균에 가장 강한 억제활성을 나타낸 추출물은 감초의 지상부와 목향의 뿌리였으며, $1,250{\mu}g/ml$에서 포자발아를 억제하였다.

Keywords

References

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