Ginsenoside content and variation among and within American ginseng (Panax quinquefolius L.) populations

Ginsenoside contents were measured in American ginseng (Panax quinquefolius) roots from 10 Maryland populations. Variation among populations was highly significant for Rg1 and Re ginsenosides. Roots from six populations (wild and cultivated) exhibited a High Rg1/Low Re chemotype (top panel) distinct from the profile characteristic of American ginseng (bottom panel).