Chemical characterization and comparison of two chestnut rose cultivars from different regions.

Chestnut rose (Rosa roxburghii Tratt.) is a native fruit in China, rich in bioactive compounds. Chemical properties and bioactive compounds in the largest two cultivars (Gui Nong No. 5 and Golden Cili) of chestnut rose from different regions were analyzed and compared. Meanwhile, catechin, quercetin, myricetin, kaempferol, ellagic acid and ellagic acid glucuronide were identified. By comparison, Guinong No. 5 showed higher SOD actitviy (5,687.67-5,797.48 U/g), ascorbic acid (1.38-1.47 g/100 g), catechin (971.67-1405.75 mg/100 g) and myricetin (851.32-876.32 mg/100 g), antioxidant capacity, while Golden Cili was characterized with higher total flavnoids (263.30-278.63 mg/100 g), β-carotene (747.31-859.21 μg/100 g) and zeaxanthin (186.03-268.78 μg/100 g), glucose (10.32-12.03 g/100 g) and arabinose (3.22-3.43 g/100 g), tartaric acid (0.20-0.52 g/100 g), quercetin (1,034.63-1,411.08 mg/100 g). The principal components analysis method can be used to separate two cultivars well and partial least squares discrimination analysis method can be used to distinguish different planting regions well.