Inoko A, Kakiuchi N, Yoshimitsu M, Cai S, Mikage M
Ephedra resource in Sichuan and Yunnan Provinces 2007. [Journal Article, Research Support, Non-U.S. Gov't]
Biol Pharm Bull 2009 Sep; 32(9):1621-3.
Wild Ephedra plants growing near the Tibetan border of Yunnan and Sichuan Provinces and north-central Sichuan were surveyed and their DNA and ephedrine alkaloids content were analyzed. By analysis of internal transcribed spacer 1 (ITS) 1 DNA, E. likiangensis was found to be the dominant species in these regions, which clustered into 2 major groups in the phylogenic tree. Most Ephedra plants in these regions of ordinal size contained ephedrine and pseudoephedrine of more than 0.7%, the requirement for Japanese Pharmacopoeia 15th edition, suggesting that they have potential for crude drug production of Ephedra herbs.
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