Phenolic compositions and antioxidant capacities of Chinese wild mandarin (Citrus reticulata Blanco) fruits

• Published in: Food chemistry 2014-02, Vol.145, p.674-680
• Main Authors: Zhang, Yuanmei, Sun, Yujing, Xi, Wanpeng, Shen, Yan, Qiao, Liping, Zhong, Liezhou, Ye, Xingqian, Zhou, Zhiqin
• Format: Article
• Language: English
• Subjects: Antioxidant capacities; Antioxidants - chemistry; Antioxidants - isolation & purification; Benzoates - chemistry; Benzoates - isolation & purification; Biological and medical sciences; China; Chromatography, High Pressure Liquid; Cinnamates - chemistry; Cinnamates - isolation & purification; Citrus - chemistry; Citrus - metabolism; Flavonoid; Flavonoids - analysis; Food toxicology; Fruit - chemistry; Fruit - metabolism; Hesperidin - analysis; Medical sciences; Phenolic acid; Plant Extracts - chemistry; Total phenolics; Toxicology; Wild mandarins
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2013.08.012

•China is rich in wild mandarin germplasms which were underutilized.•The phenolic and antioxidant activity of main Chinese wild mandarin were reported.•Some wild genotypes were rich in phenolics and exhibited high antioxidant capacity.•Remarkable variation was observed in phenolics contents and antioxidant capacity.•18 individual flavonoids and 8 phenolic acids were identified from studied fruits. As one of the most important centres of origin for the genus Citrus L., China is rich in wild mandarin germplasm. In this study, phenolic compounds in the peels of 14 wild mandarin genotypes native to China were determined and their antioxidant capacities were evaluated using DPPH, FRAP, ABTS and ORAC methods. We found that Nieduyeju had the highest total phenol content (51.14mg/gDW), and Wulongsuanju had the highest total flavonoid content (20.66mg/gDW). Hesperidin, the dominant flavonoid, was observed to be highest in Guangxihongpisuanju (55.98mg/gDW). Ferulic acid was the most abundant phenolic acid analyzed, and Nieduyeju (7780.17μg/g DW) and Guangxihongpisuanju (13,607.19μg/gDW) had the highest contents of extractable and bound phenolic acid, respectively. Antioxidant potency composite (APC) index showed obvious variations ranging from 58.84 to 98.89 in the studied wild mandarins, among them, Nieduyeju had the highest APC index. Overall, Guangxihongpisuanju, Nieduyeju, Cupigoushigan and Daoxianyeju contained more phenolics and exhibited higher antioxidant capacities than the mandarin cultivars Satsuma and Ponkan.