Phenolic Constituents of Hypericum Triquetrifolium Turra (Guttiferae) Growing in Turkey: Variation Among Populations and Plant Parts

Abstract

Hypericum triquetrifolium Turra (Guttiferae) has received considerable scientific interest in recent years, as it is a source of a variety of biologically active compounds including phenolics. T e present study was conducted to determine the variation in the content of several phenolics, namely phenylpropane chlorogenic acid and flavonoids such as rutin, hyperoside, apigenin-7-O-glucoside, kaempferol, quercitrin, quercetin and amentof avone among four H. triquetrifolium populations from the Central Black Sea Region of Turkey. The aerial parts representing a total of 30 shoots were collected at full flowering in each population. After drying at room temperature, they were dissected into f oral, leaf and stem tissues and subsequently assayed for phenolic compounds by HPLC. T e populations varied significantly in phenolic content. Among different plant parts, the flowers were found to be the principle organ for chlorogenic acid, hyperoside, apigenin-7-O-glucoside, kaempferol, quercetin and amentof avone accumulations, while rutin and quercitrin were accumulated mainly in the leaves. The presence of apigenin-7-O-glucoside and amentof avone in H. triquetrifolium is reported by us for the first time. T e chemical variation among the populations and plant parts is discussed as being possibly the result of dif erent genetic, environmental and morphological factors. © TÜBİTAK.