Study on antioxidant and bacteriostatic activities of total flavonoids from Gynostemma pentaphyllum （Thunb.） Makino in Shaanxi province

doi:10.14088/j.cnki.issn0439-8114.2022.04.030

Abstract

Abstract: The antioxidant activity of total flavonoids from Gynostemma pentaphyllum（Thunb.） Makino in Shaanxi province was evaluated by scavenging ABTS, superoxide anion and DPPH free radical. The minimum inhibitory concentration of total flavonoids from Gynostemma pentaphyllum （Thunb.） Makino against Staphylococcus aureus, Escherichia coli, Streptococcus faecalis, Bacillus subtilis and Proteus vulgaris were determined by half dilution method. The results showed that the total flavonoids extracted from Gynostemma pentaphyllum （Thunb.） Makino had certain scavenging ability in ABTS, superoxide anion and DPPH free radicals. In particular, it had strong scavenging ability in superoxide anion and DPPH free radicals. It had a certain inhibitory effect on 5 kinds of pathogenic bacteria, especially Escherichia coli and Staphylococcus aureus.

Key words: Gynostemma pentaphyllum（Thunb.） Makino, total flavonoids, antioxidant, bacteriostasis

CLC Number:

R284

MA Ze-gang, XIN Chao, YANG Xin-chun, WU Xiu-li, XU Jing. Study on antioxidant and bacteriostatic activities of total flavonoids from Gynostemma pentaphyllum （Thunb.） Makino in Shaanxi province[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(4): 150-153.

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