Seasonal Variations of Eucommiol in Eucommia ulmoides Leaves and Changes in the Amounts of Eucommiol and Aucubin in the Cortexes

Qingming Che; Jinnian Peng; Yinquan Su; Juan'e Dong

doi:10.3387/iseu.1.42

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Seasonal Variations of Eucommiol in Eucommia ulmoides Leaves and Changes in the Amounts of Eucommiol and Aucubin in the Cortexes

Qingming Che, Jinnian Peng, Yinquan Su, Juan'e Dong

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Keywords: E. ulmoides Oliv., eucommiol, seasonal variations, changes in amount, aucubin, biotransformation

JOURNAL FREE ACCESS

2007 Volume 1 Issue 1 Pages 42-43

DOI https://doi.org/10.3387/iseu.1.42

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Abstract

Methods: The amounts of eucommiol and aucubin in the leaves and barks of Eucommia ulmoides were detected by HPLC.
Results: (1) The amount of eucommiol in E. ulmoides leaves peaked in mid-September (1.450%); the amount was lowest in May (0.133%). (2) Changes in the amounts of eucommiol and aucubin in the cortexes of E. ulmoides were determined. (3) A possible biotransformation pathway that converts aucubin to eucommiol in the leaves and barks of E. ulmoides was suggested.

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