[en] 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.
Research center :
FARAH - Fundamental and Applied Research for Animals and Health - ULiège
Disciplines :
Food science
Author, co-author :
Nguyen Le Anh Dao ; Université de Liège - ULiège > Doct. sc. vété. (paysage)
Tran Minh, Phu
Douny, Caroline ; Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Analyse des denrées alimentaires
Quetin-Leclercq, Joëlle
Bui Thi Buu
Le Thi, Bach
Truong Quynh Nhu, Nhu
Bui Thi Bich Hang, Hang
Do Thi Thanh Huong, Huong
Nguyen Thanh Phuong, Phuong
Kestemont, Patrick
Scippo, Marie-Louise ; Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Analyse des denrées alimentaires
Language :
English
Title :
Screening and comparative study of in vitro antioxidant and antimicrobial activities of ethanolic extracts of selected Vietnamese plants
Publication date :
2020
Journal title :
International Journal of Food Properties
ISSN :
1094-2912
eISSN :
1532-2386
Publisher :
Marcel Dekker, New York, United States - New York
Volume :
23
Issue :
1
Pages :
481–496
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
AquaBioActive
Funders :
ARES CCD - Académie de Recherche et d'Enseignement Supérieur. Coopération au Développement [BE]
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