Abstract:

The secondary metabolites in Eucommia ulmoides organs under the same entironmental condirings were determined. Significant differences of different metabolites were showed among different plants and different organs within the same plant. Considering the contents of one kind of metabolites: chlorogenic acid:leaves>staminate flowers> bark>fruit; aucubin: fruit>leaves>bark>staminate flowers; flavonoids: staminate flowers>leaves>bark>fruit; gutta: fruit>bark>leaves>staminate flowers. Considering the contents of different metabolites in different organs, leaves: chlorogenic acid>flavonoids>gutta>aucubin; bark: gutta>aucubin>chlorogenic acid>flavonoids; staminate flowers: flavonoids>aucubin>chlorogenic acid; fruit: gutta>aucubin>flavonoids>chlorogenic acid. The results show that the contents of chlorogenic and aucubin and flavonoids in the leaves are higher than those in the bark, which indicate that the leaves can substitute for the bark. Besides the α-linolenic acid oil (51%), the fruit is also rich in gutta and aucubin, showing that the fruit is a new kind of natural resource to be developed. The contents of flavonoids are the highest in the staminate flower and lots of chlorogenic acid and aucubin are also in the staminate flower, which is a new organ needed to be developed.

Key words: Eucommia ulmoides, Secondary metabolites, Organ distribution, Difference