FOOD SCIENCE ›› 2018, Vol. 39 ›› Issue (10): 53-58.doi: 10.7506/spkx1002-6630-201810009

• Food Chemistry • Previous Articles     Next Articles

Flavonoid Content and Antibacterial Activity of Xanthoceras sorbifolia Bunge Fruit Drop

YANG Xiaohui1,2, SHI Guangbo1,2, BAI Xiaobin1,2, ZHAO Chenxuan1,2, LI Bosheng1,3,*   

  1. (1. College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China;2. Key Laboratory of Forestry Food Processing and Safety, Beijing Forestry University, Beijing 100083, China;3. Institute of Spirulina, Beijing Forestry University, Beijing 100083, China)
  • Online:2018-05-25 Published:2018-05-15

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Abstract: Objective: This study aimed to determine the total flavonoid content of Xanthoceras sorbifolia Bunge fruit drop, identify flavonoid monomers and evaluate the antibacterial activity of these flavonoids. Methods: The content of total flavonoids was determined spectrometrically, and color reaction and Fourier transform infrared spectroscopy and high performance liquid chromatography (HPLC) were used to analyze the flavonoid monomers. The antibacterial activity was evaluated against Bacillus subtilis and Escherichia coli and Staphylococcus aureus. Results: The content of total flavonoids was 18.4 mg/g. Rutin and 14 other unknown monomers were detected in the purified flavonoids. The content of rutin was 27 mg/g, which accounted for about 6% of the total flavonoids. The flavonoids from X. sorbifolia Bunge fruit drop had an inhibitory effect on B. subtilis and E. coli and S. aureus and the strongest inhibition was observed on E. coli. Conclusion: Flavonoids with strong antibacterial activity are abundant in X. sorbifolia Bunge fruit drop and rutin is an important monomer.

Key words: Xanthoceras sorbifolia Bunge fruit drop, flavonoids, high performance liquid chromatography (HPLC), infrared spectroscopy, antibacterial activity

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