Abstract
For the first time, the phenolic profile of poorly studied Siberian species of the genusMyricariaDesv.Myricaria longifolia(Willd.) Ehrenb. was investigated by HPLC and LC-MS/MS in comparison with that of wide-ranging speciesM. bracteataRoyle. 65 quantitative parameters of the phenolic profiles were processed by ANOVA and principal component analysis (PCA). The results suggest that the distinction between the species is mainly determined by the variance in total flavonoids and free quercetin in the leaves. Free gallic and ferulic acids, hyperoside and total phenolics in aqueous ethanol extract, as well as kaempferol and rhamnazin in the hydrolyzed extract contributed to the difference between the species. The significant differences justify the positions of these species in two individual series of the genusMyricariaestablished before. The statistical analysis of the biochemical data allowed us to identify both the characters that determined the distinction between species, and indicators of heterogeneity of the species that varies abnormally (the concentrations of isorhamnetin and rhamnazin, and their ratio).
Highlights
Myricaria Desv. (Tamaricaceae) is a genus of shrubs growing on mountain river banks in Asia and Eastern Europe
Aglycon compositions of M. bracteata and M. longifolia determined by LC-MS/MS were rather similar
The phenolic profile of poorly studied Siberian species Myricaria longifolia was investigated by HPLC and LC/MS/MS in comparison with that of wideranging species M. bracteata
Summary
Myricaria Desv. (Tamaricaceae) is a genus of shrubs growing on mountain river banks in Asia and Eastern Europe. E.G. Bobrov (1967) attributed the genus Myricaria to the ancient genera of the desert flora of the Eastern Hemisphere whose origin and development were associated with Central Asia. He regard M. bracteata Royle as a species the closest to the original form. The difficulties of species delimitation associated with high polymorphism and a substantial spatial and temporal variation of many morphological characters induce us to increase the reliability of taxonomic analysis due to biochemical features In this regard, secondary metabolite profiling creates additional opportunities for the identification of the phylogenetic relations between plant taxa. The aim of this study is to determine phenolic profile of M. longifolia in comparison to the profile of M. bracteata, and to identify their species-specificity
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