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Screening and comparative study of in vitro antioxidant and antimicrobial activities of ethanolic extracts of selected Vietnamese plants
International Journal of Food Properties ( IF 2.9 ) Pub Date : 2020-01-01 , DOI: 10.1080/10942912.2020.1737541
Nguyen Le Anh Dao 1, 2 , Tran Minh Phu 1 , Caroline Douny 2 , Joëlle Quetin-Leclercq 3 , Bui Thi Buu Hue 4 , Le Thi Bach 4 , Truong Quynh Nhu 1 , Bui Thi Bich Hang 1 , Do Thi Thanh Huong 1 , Nguyen Thanh Phuong 1 , Patrick Kestemont 5 , Marie-Louise Scippo 2
Affiliation  

ABSTRACT This study aimed to screen the in vitro antioxidant and antimicrobial activities of ethanolic extracts from 20 plants and three herbal commercial products empirically used for aquaculture improvement in Vietnam. The results of 2,2-diphenyl-1-pycrylhydrazyl (DPPH) radical scavenging assays showed that Phyllanthus amarus extract was the strongest antioxidant, followed by four extracts in the subsequent order: Piper betle > Psidium guajava > Euphorbia hirta > Mimosa pudica. These five plant extracts were very active in a DPPH radical scavenging assay with concentrations needed to scavenge half of the DPPH (IC50) below 30 µg/mL. Seven plant extracts showed an IC50 ranging from 31.9 to 59.7 µg/mL, while eleven extracts showed an IC50 above 70 µg/mL. A positive association was found between phenolic content (expressed as gallic acid equivalents) and antioxidant activity of the plant extracts. Concerning in vitro antimicrobial activities, P. amarus extract showed the highest activity against two different strains of Aeromonas hydrophila as demonstrated by its low minimal inhibitory concentration (MIC) of 156 and 625 µg/mL, respectively; whereas, P. betle displayed a moderate activity against Edwardsiella ictaluri with a MIC value of 625 µg/mL. Tannins were observed as significant factors contributing to antioxidant and antimicrobial properties of the plant extracts tested.

中文翻译:

选定越南植物乙醇提取物的体外抗氧化和抗菌活性的筛选和比较研究

摘要 本研究旨在筛选 20 种植物和 3 种草药商业产品的乙醇提取物的体外抗氧化和抗菌活性,经验用于改善越南的水产养殖。2,2-diphenyl-1-pycrylhydrazyl (DPPH) 自由基清除实验结果表明,余甘子提取物是最强​​的抗氧化剂,其次是四种提取物,依次为:蒺藜 > 番石榴 > 大戟 > 含羞草。这五种植物提取物在 DPPH 自由基清除试验中非常活跃,清除一半 DPPH (IC50) 所需的浓度低于 30 µg/mL。七种植物提取物的 IC50 范围为 31.9 至 59.7 µg/mL,而十一种提取物的 IC50 高于 70 µg/mL。发现酚含量(以没食子酸当量表示)与植物提取物的抗氧化活性之间呈正相关。关于体外抗菌活性,P. amarus 提取物对两种不同的嗜水气单胞菌菌株表现出最高的活性,其最低抑菌浓度 (MIC) 分别为 156 和 625 µg/mL;而 P. betle 对 Edwardsiella ictaluri 表现出中等活性,MIC 值为 625 µg/mL。单宁被认为是对所测试的植物提取物的抗氧化和抗微生物特性有贡献的重要因素。amarus 提取物对两种不同的嗜水气单胞菌菌株显示出最高的活性,其最低抑菌浓度 (MIC) 分别为 156 和 625 µg/mL;而 P. betle 对 Edwardsiella ictaluri 表现出中等活性,MIC 值为 625 µg/mL。单宁被认为是对所测试的植物提取物的抗氧化和抗微生物特性有贡献的重要因素。amarus 提取物对两种不同的嗜水气单胞菌菌株显示出最高的活性,其最低抑菌浓度 (MIC) 分别为 156 和 625 µg/mL;而 P. betle 对 Edwardsiella ictaluri 表现出中等活性,MIC 值为 625 µg/mL。单宁被认为是对所测试的植物提取物的抗氧化和抗微生物特性有贡献的重要因素。
更新日期:2020-01-01
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