Effect of elicitors on stemona alkaloid production: The
effect of chitosan on the growth rate of Stemona root is
shown in Fig. 2a. This compound slightly decreased root
growth. The effect of chitosan on the growth of Panax
ginseng has been investigated. It was found that chitosan
slightly inhibited hairy root growth (Jeong and Park,
2005). On the otherhand, chitosan had a positive effective
of Stemona alkaloid production. The highest Stemona
alkaloid production was found using 25 mg/L chitosan
over a one week culture period. 1, 2 -Didehy drostemo
foline and stemofoline production were 2.65 and 2.95 fold
higher than the control, respectively (Fig. 2b-c). Chitosan,
a polycationic polysaccharide, has been confirmed as