Phylogenetic Analysis in Genus Euchresta Based on Secondary Metabolites.

Abstract Two different phylogenetic relationships among Euchresta species have been proposed on the basis of general morphology. To confirm the relationships, we applied a cladistic analysis based on the secondary metabolites in the genus. Our accumulated data on the structures of prenylflavonoid compounds in the stems and the roots of all Euchresta species revealed the presence of presumed enzymes which contribute to their formation. The enzymes were used as characters in the phylogenetic analysis of Euchresta plants and a relative, Sophora tonkinensis. The cladistic analysis and the results of relative ratios of O- or C-apigenin glycosides in the leaves led us to propose new evolutionary trends in Euchresta.