In vitro antioxidant and antimicrobial properties of jambolan (Syzygium cumini) fruit polyphenols. (January 2016)

• Record Type: Journal Article
• Authors: Singh, Jatinder Pal; Kaur, Amritpal; Singh, Narpinder; Nim, Lovedeep; Shevkani, Khetan; Kaur, Harpreet; Arora, Daljit Singh
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 65(2016)
• Page Start: 1025
• Page End: 1030
• Publication Date: 2016-01
• Subjects: Antioxidants -- Antimicrobial -- Jambolan fruit -- Pathogens -- Polyphenols; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2015.09.038
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: The present study was undertaken to examine antioxidant and antimicrobial activities of jambolan fruit polyphenols against reference pathogenic strains ( Staphylococcus aureus, methicillin-resistant S. aureus [MRSA], Escherichia coli, Klebsiella pneumoniae and Candida albicans ) and were compared to that of polyphenol standards (gallic acid, quercetin, caffeic acid, sinapic acid and delphinidin chloride). DPPH, ABTS and FRAP assays showed that antioxidant activity for different polyphenols varied significantly ( P < 0.05). Gallic acid and quercetin showed higher antioxidant activities (DPPH and ABTS) than the other standards. Jambolan fruit polyphenol extract exhibited a broad spectrum antimicrobial activity against reference pathogenic strains with a zone of inhibition and minimum inhibitory concentration in the range from 14.3 to 23.0 mm and 0.5–2.5 mg/ml, respectively. Moreover, most of the polyphenol standards inhibited the growth of pathogens used in this study. Highlights: The antioxidant and antimicrobial activities of jambolan polyphenols were evaluated. These activities were compared to that of five polyphenol standards. Antioxidant activity of jambolan ranged from 6.7 to 8.2 mM trolox equivalents/g. Zone of inhibition ranged from 14.3 to 23.0 mm for jambolan against tested microbes.