Phenolic composition and content of representatives of genus Spiraea L. under industrial pollution in Novosibirsk

The composition and content of groups of phenolic compounds (free flavonol aglycones, flavonol glycosides, free and bound phenolic acids, hydroxybenzoic acids, hydroxycinnamic acids, and their esters) and individual components (quercetin; kaempferol; rutin; hyperoside; isoquercitrin; avicularin; and gallic, protocatechuic, vanillic, salicylic, chlorogenic, p-coumaric, o-coumaric and cinnamic acids) in leaves of Spiraea media Fr. Schmidt, S. chamaedryfolia L., and S. hypericifolia L. growing in areas of Novosibirsk with high and background levels of industry pollution have been studied. Differences in phenolic composition and content are revealed. The total phenolic content in leaves of the studied species in pollution is 1.6 (S. hypericifolia) and 2.4 (S. media and S. chamaedryfolia) fold lower than the background conditions. The decrease in the phenolic content in S. media are due to flavonol glycosides (mostly rutin), and in S. chamaedryfolia and S. hypericifolia it is due to hydroxycinnamic acids and their esters.