Stability and Reproducibility of Ephedra sinica Ephedrine Alkaloid Content and Terrestrial Stem Dry Weight.

Dried terrestrial stems of Ephedra sinica are known as 'Ephedra herb.' The pharmacological effects are mainly related to two major ingredients, (-)-ephedrine and (+)-pseudoephedrine (total alkaloids which are defined in Japanese Pharmacopoeia, TA). In this study, in order to aid in cultivation and breeding, the stability of TA content and stem dry weight of 46 E.

Validity of Selection Breeding for High Ephedrine-Alkaloid Content in E. sinica under Different Environments in Japan.

Dried terrestrial stems of Ephedra sinica are called 'Ephedra herb,' whose pharmacological effects are due mainly to two major ingredients, (-)-ephedrine and (+)-pseudoephedrine (total alkaloids which are defined in Japanese Pharmacopoeia (TA)). Ephedra herb is an important crude drug in Japan. However, E.

Stabilization of Ephedrine Alkaloid Content in Ephedra sinica by Selective Breeding and Stolon Propagation.

The Ephedra herb, which has been used in Kampo medicines, originates from terrestrial stems of Ephedra species. It is important to establish cultivation methods and cultivars to secure a stable supply of the Ephedra herb that would meet the quality standards for the ephedrine alkaloids content. In this study, we first grew Ephedra sinica plants derived from seeds in the field for 5 years.