CONCLUSION
Treatment of Stemona sp. cultures with chitosan and
yeast extract resulted to enhance Stemona alkaloid
production. The highest Stemona alkaloid accumulation
was found in the culture using 25 mg/L chitosan. This
treatment resulted in the production of 1 , 2 -
didehydrostemofoline and stemofoline in 2.65 and 2.95
fold higher amounts than the control, respectively.