ABSTRACT

Natural dyes (NDs) are colourants originated from natural sources such as plants, animals, minerals and microbes. Survey of dye-producing plants in India had been done but information on the antioxidant screening of the NDs and evaluation of their antimicrobial properties remain scanty. This study aimed at evaluating antioxidant compounds in selected plant-based dyes and their antimicrobial potentials. Fifteen (15) plants were collected in Tarsadi and Bardoli, Gujarat, India. Dye was extracted from the plants using aqueous extraction method. Flavonoids, Phenolic compounds and hydroxyl radical scavenging activity of each of the NDs were determined. Antimicrobial potential of the samples was tested against Escherichia coli, Bacillus megaterium, Proteus vulgaris and Enterobacter aerogenes using agar well diffusion method. Beta vulgaris had highest amount of total flavonoids (1.80mg/g) and the least was found in Daucus caurota(0.10mg/g). Ixora coccinea and Crinum augustum had total phenolic compounds of 1.78mg/g and 1.75mg/g respectively. Bougainvillea glabra displayed highest hydroxyl radical scavenging activity. It is evidenced from this study that NDs from H. rosa-sinensis (pink), Bougainvillea glabra, Citrus limonand Fragaria ananassa were more potent against three tested bacteria than other samples. These dyes are good and recommended for textile industries to make cloths more hygienic, un harmful and pleasant. The antioxidants in NDs will benefit food and pharmaceutical industries. Keywords: Antimicrobial, Antioxidant, Natural dyes, Textile
Publication date: 01/09/2020

https://ijbpas.com/pdf/2020/September/MS_IJBPAS_2020_5134.pdf

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https://doi.org/10.31032/IJBPAS/2020/9.9.5134