Figure 1: Effects of ethanol extracts of Polygonatum kingianum (P. kingianum) rhizomes on PGE2 production. Data are expressed as mean ± SD of three independent experiments. One-way ANOVA followed by Bonferroni post-test was used for statistical comparison between the treatment and control groups. **P<0.01. ETPK: ethanol extracts of P. kingianum rhizomes.