Effects of Different Barking Treatments on Secondary Metabolites of Eucommia ulmoides and Its Ability of Repairing Injury

【Objective 】In this study,effects of different barking treatments on secondary metabolites of Eucommia ulmoides and its ability of repairing injury were investigated to provide a reference for rational utilization the trees.【Method】The content of the soluble sugar,malonaldehyde( MDA),free proline( Fpro),chlorogenic acid,total flavone,geniposidic acid and the activity of phenylalnine ammonialyase( PAL) in leaves of E. ulmoides were tested over116 days after treatments with 50%,75% and 100% barking. 【Result】Under different barking treatments,the content of soluble sugar in E. ulmoides leaves showed a trend of first increasing and then decreasing to a stable level; except for 21 days and 36 days,50% barking and 75% barking did not significantly change the soluble sugar content in leaves( P >0. 05); after 36 days,100% barking obviously led to an increase in soluble sugar content,by 1. 3-fold of the control.Different barking treatments remarkably led to an increase in Fpro content,among them,100% barking was obvio