Interspecific and Local Variations of Magnolol, Honokiol, and β-eudesmol Contents and Correlation between those Contents and Morphological Characters of Magnolia Barks

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To clarify the interspecific and local variations of magnolol, honokiol, and β-eudesmol contents in the magnolia barks, their contents and morphological characteristics of Magnolia obovata, M. officinalis, and M. officinalis var.biloba were studied. The results were as follows. Magnolia officinalis examined had the significantly higher magnolol and honokiol contents than M. obovata and M. officinalis var. biloba. Magnolia obovata had a significantly higher β-eudesmol content than M. officinalis and M. officinalis var. biloba. Additionally, in M. officinalis, a comparatively close correlation was recognized between the magnolol content and the honokiol content, and between the magnolol content and the thickness of bark. Therefore, we propose the ways to choose the Chinese magnolia barks similar to the Japanese magnolia barks in the magnolol content based on the thickness of bark.
2000-04-20