Abstract
Chestnut rose (Rosa roxburghii Tratt.) is an underutilized plant in the Rosaceae family that originates from southwest of China. This study used UHPLC-IM-QTOF and UPLC-QQQ to analyze the free and bound phenolic fractions in three cultivars of chestnut rose fruit from different producing areas. The optimization of IM feature acquisition was conducted firstly. Then, 23 phenolics were reported in chestnut rose fruit for the first time. Differential phenolics profiles were observed between cultivars and fractions, with 24 phenolics further quantified. Catechin, procyanidin B1, gallic acid, ellagic acid and isoquercitrin were the five most abundant phenolics. Most of the phenolics were more abundant in the free fraction than in the bound fraction. As many phenolics were reported with functions such as antioxidant, antidiabetic and anti-cancer, the chestnut rose fruit could serve as a healthy functional supplement foods in the form of juice, oral solution and powder, as well as an ingredient for functional foods.
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