Abstract
Longan is widely consumed due to its high nutritional value. The growing area has substantial effect on nutrient component and secondary metabolism of fruits. The aim of this study was to analyze the differences in physicochemical characteristics, polyphenol profiles, and antioxidant activity of longan fruits grown in four regions of China. Two representative cultivars ‘Shixia’ and ‘Chuliang’ located in Chongqing, Guanxi, Zhanjiang and Hainan were collected and analyzed. The results showed that the fruit weights, edible rates, and total soluble solids were 5.63–12.57 g, 52.7–68.7% and 17.54–23.68%, respectively. The titratable acids, reducing sugars, vitamin C contents were 0.22–0.62%, 2.27–5.55% and 68.29–157.34 mg/100 g, respectively. Interestingly, contents of total polyphenols and antioxidant activities in longan pericarps from Chongqing were higher than those from low-latitude regions for two cultivars. In addition, 10 polyphenols were detected by UPLC–QqQ-MS/MS which showed that the content of polyphenols was much higher in longan pericarps than in pulps. The content of polyphenol profiles in longan was mainly influenced by its tissue distribution. Cultivar type may also affect the polyphenol profile of longan.
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The datasets generated during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
This research was sponsored by Natural Science Foundation of Chongqing, China (CSTB2022NSCQ-MSX0778), Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences (No. 1630062020003), the Science and Technology Foundation of Guizhou Province (No. Qian kehejichu-ZK [2021] yiban 400), Guizhou Administration of Traditional Chinese Medicine Projects (QZYY-2022-023), the National Natural Science Foundation of China (NSFC) Special Fund for Research Innovation and Exploration Projects of Guizhou University of Chinese Medicine (2019YFC171250502).
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ke, Z., Tan, S. & Shi, S. Physicochemical characteristics, polyphenols and antioxidant activities of Dimocarpus longan grown in different geographical locations. ANAL. SCI. 39, 1405–1412 (2023). https://doi.org/10.1007/s44211-023-00352-2
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DOI: https://doi.org/10.1007/s44211-023-00352-2