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Cho, Jun Young,Choi, Gyung Ja,Son, Seung Wan,Jang, Kyoung Soo,Lim, He Kyoung,Lee, Sun Og,Sung, Nack Do,Cho, Kwang Yun,Kim, Jin-Cheol John Wiley Sons, Ltd. 2007 PEST MANAGEMENT SCIENCE Vol.63 No.9
<P>BACKGROUND: In a search for plant extracts with potent in vivo antifungal activity against various plant diseases, we found that treatment with a methanol extract of Myristica fragrans Houttyn (nutmeg) seeds reduced the development of various plant diseases. The objectives of the present study were to isolate and determine antifungal substances from My. fragrans and to evaluate their antifungal activities.</P> <P>RESULTS: Three antifungal lignans were isolated from the methanol extract of My. fragrans seeds and identified as erythro-austrobailignan-6 (EA6), meso-dihydroguaiaretic acid (MDA) and nectandrin-B (NB). In vitro antimicrobial activity of the three lignans varied according to compound and target species. Alternaria alternata, Colletotrichum coccodes, C. gloeosporioides, Magnaporthe grisea, Agrobacterium tumefaciens, Acidovorax konjaci and Burkholderia glumae were relatively sensitive to the three lignans. In vivo, all three compounds effectively suppressed the development of rice blast and wheat leaf rust. In addition, EA6 and NB were highly active against the development of barley powdery mildew and tomato late blight, respectively. Both MDA and NB also moderately inhibited the development of rice sheath blight.</P> <P>CONCLUSION: This is the first study to demonstrate the in vitro and in vivo antifungal activities of the three lignans from My. fragrans against plant pathogenic fungi. Copyright © 2007 Society of Chemical Industry</P>
이동웅,최형철,이광윤,이수관,김정애,용철순,김진숙,허근,신손문,구병수,하정희,Lee, Dong-Ung,Choi, Hyung-Chul,Lee, Kwang-Youn,Lee, Soo-Kwan,Kim, Jung-Ae,Yong, Chul-Soon,Kim, Jin-Sook,Huh, Geun,Shin, Son-Moon,Koo, Byung-Soo,Ha, Jeoung-He Korean Society of Life Science 2006 생명과학회지 Vol.16 No.7
The present study was performed to investigate the sedative effects of the combined administration of phenolic compounds. 4-hydroxy-3-methoxybenzaldehyde, a component of Gastrodia elnta, showing positive GABAergic neuromodulation was administered intraperitoneally together with an identical dose of 2,3-dihydroxybenzaldehyde, a potent antioxidant, to the rats and then evaluated for its effects on the convulsion, the hypnosis, the inxiety and the muscle relaxation. Combined administration of both compounds significantly reduced the pentyleneterazole-induced lethality. In addition, this mixture significantly enhanced the pentobarbital-induced sleeping time. Contrary to the anticonvulsive and sedative effects, the combined administration did not exhibit anxiolytic or muscle relaxant activities. These results indicated that the combined treatment of 2,3-dihydroxybenzaldehtyde and 4-hydroxy-3-methoxybenzaldehyde with different effects leads to the anticonvulsion and/or sedation 페놀성 화합물들의 병용투여가 rat의 진정효과에 미치는 영향을 조사하였다. 천마성분으로서 positive GABAergic neuromodulation을 보이는 4-hydroxy-3-methoxybenzaldehyde와 강력한 항산화물질인 2,3-dihydroxlrbenzaldehyde를 동량 투여한 결과, pentyleneterazole에 의해 유발된 사망률이 유의하게 감소되었으며 pentobarbital에 의해 유도된 수면시간은 유의하게 연장되었으나 항불안효과와 근육이완효과는 나타나지 않았다. 이러한 결과로 보아 항경련효과를 가진 화합물과 항산화 효과를 가진 화합물을 병용투여 함으로서 경련이나 불면 등의 신경증상을 효과적으로 억제할 수 있을 것으로 사료된다.