• Mycobiology
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• 제33권2호
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• pp.97-103
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• 2005

Crude extracts and active principles from medicinal plants have shown potential role in controlling plant diseases in glasshouses as well as in fields as one of the safest and ecofriendly methods. The effect of nor-securinine (an alkaloid) isolated from Phyllanthus amarus has been seen against spore germination of some fungi (Alternaria brassicae, A. solani, Curvularia pennisetti, Curvularia sp., Erysiphe pisi, Helminthosporium frumentacei) as well as pea powdery mildew (Erysiphe pisi) under glasshouse conditions. The sensitivity of fungi to nor-securinine varied considerably. Nor-securinine was effective against most of the fungi. H. frumentacei was more sensitive even at the lowest concentration ($1,000\;{\mu}g/ml$). Likewise conidia of E. pisi were also inhibited in partially or completely appressorium formation. Pre-inoculation treatment showed greater efficacy than post-inoculation in inhibiting powdery mildew development on pea plants in a glasshouse. Maximum inhibition occurred at $2000\;{\mu}g/ml$.

• Mycobiology
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• 제36권2호
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• pp.99-101
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• 2008

The alkaloid securinine was assessed against spore germination of some plant pathogenic and saprophytic fungi (Alternaria alternata, Alternaria brassicae, Alternaria brassicicola, Curvularia lunata, Curvularia maculans, Curvularia pallenscens, Colletotrichum musae, Colletotrichum sp., Erysiphe pisi, Helminthosporium echinoclova, Helminthosporium spiciferum, Heterosporium sp.). Spore germinations of all the tested fungi were inhibited. Alternaria brassicicola, C. lunata, C. pallenscens and H. spiciferum were highly sensitive as complete inhibition of spore germination was observed at very low concentrations (200 ppm).

• Applied Biological Chemistry
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• 제6권
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• pp.33-36
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• 1965

(1) 한국중부산(韓國中部産) 광대싸리(Securinega suffruticosa Rohder)에 함유(含有)되는 식물성염기(植物性鹽基) Securinine의 추출(抽出)을 기도(企圖)하였다. (2) 한국원내식물분포도(寒國內源植物分布圖)는 극동지역(極東地域) 제일(第一)의 생태피도(生態被度)를 갖는 것으로 생각(生覺)된다. (3) 융점(融點)과 외부형태(外部形態)(현미경적(顯微鏡的)) 그리고 기타(其他)를 종합고찰(綜合考察)하여 추출물(抽出物)이 Securinine이라는 것을 확인(確認)하였다. (4) 수율(收率)을 평균(平均) 0.075% 였고 낙엽직전(落葉直前)의 황엽(黃葉)이란 점(點)이 함량(含量)을 감소(減少)케한 원인(原因)으로 생각(生覺)되었으며 하기생육(夏期生育)이 증가(增加)한 시기(時期)를 골라 재추출(再抽出)을 하면 상당(相當)한 수율(收率)의 증가(增加)를 가져올 것으로 추측(推測)되었다. (5) 수지상(樹脂狀) 점조물(粘稠物) 함유(含有) alkaloide 간(間)의 분리(分離)에는 새로운 용매(溶媒)의 선택(選擇)과 조작(操作)을 강구(講究)하여야 할것으로 생각(生覺)된다. (6) 추출과정(抽出過程)은 다소변경(多少變更)하였으며 앞으로 더욱 간편(簡便)하고 고수율(高收率)인 방법(方法)이 강구(講究)될 가능성(可能性)은 찾을수 있었다.