期刊
PLANTS-BASEL
卷 10, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/plants10040615
关键词
Cistus creticus; Cistaceae; rockrose; HPLC; polyphenols; flavonoids; ellagitannins; antioxidant activity; chemotaxonomy
资金
- Austrian Science Foundation (FWF) [P 29305-B22]
This study focused on the polyphenolic composition of Cistus creticus and six other Cistus species, finding differences in the chemical profiles which allowed for classification into two chemovariants. Plants with punicalagin derivatives and flavonol glycosides were abundant in the western Mediterranean, while those in Albania and eastwards had a nearly pure flavonol type. C. creticus showed a median antioxidative capacity of about half of the species with the highest antioxidative potential.
This investigation focused on the qualitative and quantitative composition of polyphenolic compounds of Mediterranean northern shore Cistus creticus and six further, partly sympatric Cistus species (C. albidus, C. crispus, C. ladanifer, C. monspeliensis, C. parviflorus, C. salviifolius). Aqueous extracts of 1153 individual plants from 13 countries were analyzed via high performance liquid chromatography (HPLC). The extracts of C. creticus were primarily composed of two ellagitannins (punicalagin and punicalagin gallate) and nine flavonol glycosides (myricetin and quercetin glycosides, with m-3-O-rhamnoside as the dominant main compound). Differences in the proportions of punicalagin derivatives and flavonol glycosides allowed the classification into two chemovariants. Plants containing punicalagin derivatives and flavonol glycosides were especially abundant in the western and central Mediterranean areas and in Cyprus. From Albania eastwards, punicalagin and punicalagin gallate were of much lesser importance and the predominant chemovariant there was a nearly pure flavonol type. With its two chemovariants, C. creticus takes a central position between the flavonol-rich, purple-flowered clade (besides C. creticus, here represented by C. albidus and C. crispus) and the more ellagitannin-rich, white- or whitish-pink-flowered clade (here represented by C. ladanifer, C. monspeliensis, C. parviflorus and C. salviifolius). The median antioxidative capacity of C. creticus plant material was, with 166 mg Trolox equivalents/g dry wt, about half of the antioxidative capacity of C. ladanifer (301 mg te/g dry wt), the species with the highest antioxidative potential.
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