Abstract
Berberis asiatica samples collected from nine altitudes of Kumaun Himalaya, India were analyzed for berberine concentrations using high-performance liquid chromatography. Correlation between berberine concentration, size class, and season were established. The root and stem bark samples from lower altitude, having larger size class, contained more berberine. Berberine concentration was the highest in summer and lowest in the rainy season. Low level of soil moisture and higher level of soil potassium produced higher berberine concentrations.
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