Phenolic content, antioxidant capacity, and α-amylase and α-glucosidase inhibitory activities of Lour.

Journal: Food science and biotechnology
Published Date: Dec 23, 2019

Abstract

The aim of this study was to compare the phenolic compound profiles and antioxidant capacities of eight varieties of longan ( Lour.) planted in the middle and upper Yangtze River area. The total polyphenols content (TPC) and total flavonoids content (TFC) of dried longan pulp ranged from 1.07 ± 0.05 to 1.22 ± 0.05 mg gallic acid equivalents/g and 0.25 ± 0.07 to 0.87 ± 0.14 mg rutin equivalents/g. UHPLC-QqQ-MS/MS analysis revealed 12 individual polyphenol compounds in longan. The Fuwan8, Dongliang and FD97 varieties showed the strongest DPPH scavenging activity (IC of 1.03 g/mL). The highest ABTS scavenging activity was found in the Dongliang. In the enzyme assays, the Fuwan8 and Dongliang varieties demonstrated maximum α-amylase and α-glucosidase inhibition activities, with values of 97.56 and 88.58%, respectively. The principal component analysis indicated that the Rongyu8 and Songfengben cultivars have nearly analogous polyphenol compounds.

Authors

  • Zhuo Wang
    Sichuan Center for Disease Control and Prevention, Chengdu 610500, China.
  • Xiaoxv Gao
    2School of Advanced Agriculture and Bioengineering, Yangtze Normal University, No. 16 Juxian Avenue, Fuling District, Chongqing, 408100 China.
  • Wenfeng Li
    2School of Advanced Agriculture and Bioengineering, Yangtze Normal University, No. 16 Juxian Avenue, Fuling District, Chongqing, 408100 China.
  • Si Tan
    Institute of HIV/AIDS The First Hospital of Changsha, Changsha, China.
  • Qiaoran Zheng
    2School of Advanced Agriculture and Bioengineering, Yangtze Normal University, No. 16 Juxian Avenue, Fuling District, Chongqing, 408100 China.

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