Abstract
The acetone extract of the bark ofMagnolia obovata Thunb. had potent antifungal activity against plant pathogenic and wood destroying fungi. The active principles were isolated and identified to be eudesmols (I), magnolol (II) and honokiol (III). Eudesmols, which are main components of the volatile bark oil, showed strong antifungal activity against all of the fungi tested, especially basidiomycetes. It completely inhibited the growths ofCoriolus versicolor, Lepista sordida, Pycnoporus coccineus, Rhizoctonia solani, Serpula lacrymans andTyphula ishikariensis at a concentration of 500 μg mL−1. Two biphenyl type neolignans, magnolol and honokiol, also exhibited potent antifungal activity against these fungi except againstC. versicolor andL. sordida. They completely depressed the growths ofS. lacrymans andT. ishikariensis at the same concentration.
Zusammenfassung
Der Acetonextrakt der Rinde vonMagnolia obovata Thunb. zeigte pilzhemmende Wirkungen gegen pflanzliche Krankheitserreger und abbauende Pilze auf. Die aktiven Stoffe wurden isoliert und identifiziert als Eudesmol (I), Magnolol (II) und Honokiol (III). Die Endesmole, die die Hauptkomponenten der ätherischen Öle in der Rinde ausmachen, wiesen starke Hemmwirkung gegen alle getesteten Pilze auf, besonders gegen Basidomyceten. Mit einer Konzentration von 500 μg mL−1 ergab sich ein völlige Hemmung des Wachstums vonCoriolus versicolor, Lepista sordida, Pycnoporus coccineus, Rhizoctonia solani, Serpula lacrymans andTyphula ishikariensis. Zwei Neolignane vom Biphenyltyp, Magnolol und Honokiol, zeigten ebenfalls pilzhemmende Wirkung außer gegenC. versicolor undL. sordida. Das Wachstum vonS. lacrymans undT. ishikariensis wurde bei der gleichen Konzentration völlig gehemmt.
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Mori, M., Aoyama, M. & Doi, S. Antifungal constituents in the bark ofMagnolia obovata Thunb. Holz als Roh-und Werkstoff 55, 275–278 (1997). https://doi.org/10.1007/BF02990563
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DOI: https://doi.org/10.1007/BF02990563