Proximate composition, minerals analysis and antibacterial potential of Syzygium cumini L. leaves, flower and bark extracts against foodborne pathogens

Abstract

The current study was carried out to evaluate the proximate compositions, minerals assessment and antimicrobial activities of leaves,  bark and flower of Syzygium cumini L. Proximate compositions were carried out using standard methods. The mineral analyses were  assessed by Flame Photometer and Atomic Absorption Spectrophotometer. Antibacterial potential were assayed using Well-diffusion  assay for three extracts (decoction, infusion and tincture). The proximate composition of Syzygium cumini L. leaves, flower and bark were  found in the range i.e. moisture 3.5-05%, ash 05-07%, crude fat 0.4-2.5%, crude fiber 08-23%, protein 02-04%, carbohydrate 64.1-78.9% and  energy 268-335Kcal/100 g dw. Similarly the minerals quantification (mg/Kg) range were calculated as Sodium 1300-1600, Potassium  3250-5000, Calcium 12500-24000, Magnesium 5000-9600, Zinc 30- 60, Iron 140-500 and Manganese 30-100. The tincture observed the most  efficient extract followed by infusion and decoction. While bark showed the least antibacterial potential against the pathogenic  bacteria as compared to leaves and flower. The results commonly observed that generally the high opposing were observed by Gram-ve  microbes to the Syzygium cumini L. extracts as compared to Gram-positive bacteria. These findings observed that Syzygium cumini leaves,  flower and bark are a connection of health promoting major mineral elements and nutrition ingredients. Therefore, it can be a latent  resource of natural minerals, fiber, protein and antibacterial agents in food, feed and medicine. This study exemplifies the latent of this  plant as a substitute feed and food supplement to make stronger food security.