Quantitative analysis of glucofrangulins and phenolic compounds in Croatian Rhamnus and Frangula species

Abstract

We determined the content of biologically active compounds in the bark of seven Rhamnus L. and two Frangula Mill. species growing in Croatia. All taxa tested had high content of total polyphenols (from 2.68% in R. orbiculata Bornm. to 8.50% in R. pumila Turra), moderate content of glucofrangulins (from 0.22% in R. pumila to 9.26% in R. fallax Boiss.), nontannic polyphenols (from 0.73% in R. orbiculata to 5.92% in F. alnus Mill.) andtannins (from 1.10% in R. saxatilis Jacq. to 4.92% in R.alaternus L.), and low content of phenolic acids (from0.44% in R. orbiculata to 1.81% in R. intermedia Steud. & Hochst.) and flavonoids (from 0.02% in F. alnus to1.44% in R. pumila). By ANOVA, variability was highest for glucofrangulin content, less for flavonoids, phenolicacids and nontannic polyphenols, and least for total polyphenols and tannins. © Polish Academy of Sciences and Jagiellonian University, Cracow 2010.