Abstract
Gymnema sylvestre (Madhunashini) is one of the most important medicinal plants used as a crude drug for its preventive and therapeutic properties. Among other constituents of Gymnema, gymnemic acid is a major component responsible for biological and pharmacological actions. The present study deals with the influence of different media strength and initial medium pH on the growth of hairy roots and gymnemic acid production from Gymnema sylvestre. Higher strength of the media (1.5X) favoured the biomass production (114.64 g/L FW and 12.63 g/L DW) and gymnemic acid content (11.7 mg/g DW) in the tested range of 0.25, 0.50, 0.75, 1.0, 1.5 and 2.0 X strength. Among the different hydrogen ion concentration (pH) of 4.0, 4.5, 5.0, 5.5, 5.8, 6.0 and 6.5, initial medium pH of 6.0 favoured the biomass production (102.41 g/L FW and 11.52 g/L DW) and medium pH of 5.8 favoured the gymnemic acid production (11.30 mg/g DW).
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