Allelochemicals Biologica... - Name

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MARK A. BERNARDS, LINA F. YOUSEF, ROBERT W. NICOL
are 6-O and 20-O diglycosides (Figure 1). Ginsenosides can represent approximately
3-7% dry weight of the root (Court et al., 1996; Li et al., 1996; Nicol et al., 2002) and
are found in the foliage at lower levels (Chen and Staba, 1978). In Asian ginseng,
Panax ginseng C.A. Meyer, ginsenosides are found in the outer cortex and periderm
of roots (Tani et al., 1981).
Figure 1. The Major Ginsenosides of Panax spp. The three main triterpenoid aglycones
(20S)-protopanaxadiol, (20S)-protopanaxatriol, oleanoic acid), as well as the six major
ginsenosides of Panax spp. are shown. Ginsenosides are named according to their migration
properties on TLC, with no regard for whether they are (20S)-protopanaxadiol-, (20S)protopanaxatriol-
or oleanoic acid-derived. Ginsenoside Rf (not shown) is a major
ginsenoside of P. ginseng but is not found in P. quinquefolius.