Rosa damascena Mill. is an important rose species which contain essential oil.“Damask Rose” is one of the oldest medicinal and aromatic plants in the world. This studywas conducted to comare the metabolite compounds across 6 Damask rose populations fromKashan area (Barzuk, Niasar, Azearan, Kolope, Kheirabad and Aheste) and one fromHamedan province (Bahar). In this study, chlorophyll and carotenoid contents of leaves,total phenol andflavonoid contents of leaves and petals, total anthocyanin content of petals,and antioxidant activities of leaves and petals were evaluated for all plants samples.Quercetin contents of leaves and petals were measured by HPLC analyses. Based on theresults, the highest leaf chlorophyll and carotenoid contents were obtained from Aheste andNiasar samples. The highest leaf phenol content (28.36 mg/g extract weight) was recordedfor Azearan, while no significant difference was observed among populations in petal phenolcontents. Azearan population also had the highest amount of flavonoid content in the leaves. The highest petal flavonoid content (1.22 mg/g extract weight) and petal anthocyanin content(0.168 mg/g extract weight) were recorded for Aheste and Niasar populations, respectively.The highest and lowest antioxidant capacities in the leaves were found in Aheste (51.53%inhibition) and Hamadan (49.44%) populations, respectively, but no significant differencewas observed in petal antioxidant capacities between the populations. The averageantioxidant capacity in the leaves was higher than those of the petals. According to the resultsof traits correlation analysis, no significant and positive relationship was observed betweenphenol and flavonoid contents, and antioxidant capacity in leaf and petal. The highestconcentrations of quercetin in leaf and petal, were obtained from Azearan (1.006 mg/gextract weight) and kheirabad (0.21mg/g extract weight) populations, respectively.
