Effect of Water Stress on Ginsenoside Production and Growth of American Ginseng

in HortTechnology
View More View Less
  • 1 Department of Plant Breeding and Genetics, Cornell University.
  • | 2 Department of Horticulture, Cornell University, Ithaca, NY 14853

We determined the effect of moderate water stress on the growth of american ginseng (Panax quinquefolium), and on concentrations of six major ginsenosides (Rg1, Re, Rb1, Rc, Rb2, and Rd). Two-year-old “rootlets” (dormant rhizome and storage root) were cultivated in pots, in a cool greenhouse (18.3 ± 2 °C). Pots were watered either every 5 days (control) or every 10 days (stress), repeatedly for 8 days. Soil volumetric water content was measured during the last 10 days of the experiment for both treatments. Leaf water potential, measured on the last day of the experiment, was -0.43 MPa for the control and -0.83 MPa for the stress treatment. Drought stress did not affect above-ground shoot or root dry weight. Initial rootlet fresh weight (covariate) had a significant effect on the concentration of ginsenosides Re, Rb1, Rc, and Rb2. Drought stress increased the concentration of ginsenosides Re, Rb1, and total ginsenoside concentration.

Contributor Notes

(tel. 607.255.1794; fax 607.255.9998; e-mail: kwm2@cornell.edu).
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 23 23 5
PDF Downloads 27 27 8