Antioxidant and Antibacterial Activities of Crude Extracts and Essential Oils of Syzygium cumini Leaves

Abstract

This research highlights the chemical composition, antioxidant and antibacterial activities of essential oils and various crude extracts (using methanol and methylene chloride) from Syzygium cumini leaves. Essential oils were analyzed by gas chromatography-mass spectrometry (GC-MS).The abundant constituents of the oils were: α-pinene (32.32%), β-pinene (12.44%), trans-caryophyllene (11.19%), 1, 3, 6-octatriene (8.41%), delta-3-carene (5.55%), α-caryophyllene (4.36%), and α-limonene (3.42%).The antioxidant activities of all extracts were examined using two complementary methods, namely diphenylpicrylhydrazyl (DPPH) and ferric reducing power (FRAP). In both methods, the methanol extract exhibited a higher activity than methylene chloride and essential oil extracts. A higher content of both total phenolics and flavonoids were found in the methanolic extract compared with other extracts. Furthermore, the methanol extract had higher antibacterial activity compared to methylene chloride and the essential oil extracts. Due to their antioxidant and antibacterial properties, the leaf extracts from S. cumini may be used as natural preservative ingredients in food and/or pharmaceutical industries.

Phytochemical Composition and Pleotropic Pharmacological Properties of Jamun, Syzygium Cumini Skeels

“…45 The methanol, and methylene chloride extracts of Jamun leaves and its oils have been reported to scavenge DPPH radicals and increase the FRAP. 46 The studies on methanol and aqueous leaf extracts of Jamun have also revealed an ability to inhibit the generation of OH, NO, and DPPH free radicals in a concentration-dependent manner and to cause an increase in the FRAP with increasing concentrations. 47 The above-mentioned DPPH radical scavenging and FRAP study revealed that the ethanol seed extract was the most potent, followed by stem bark and leaf extracts of Jamun.…”

“…53 The methanol and methylene chloride leaf extracts and the essential oils from Jamun leaves exhibited antibacterial activity against both Gram-positive and Gram-negative bacteria, and the methanol extract was superior to the methylene chloride extract and leaf oil. 46 The ethanol extract of Jamun roots was found to be active against S. aureus, S. epidermidis, E. coli, Streptococcus suis, Salmonella spp. and Corynebacterium diphtheriae.…”

A review on the effects of prebiotics on cell toxicity and integrity

“…The effectiveness of the metabolites in reducing cytotoxicity is related to their antimicrobial and antioxidant properties. [9] Another example is konjac glucomannan (KGM; soluble fibre), which is known to reduce the cytotoxicity of fecal water just as insoluble fibre does. [10] In addition, KGM not only lowers the concentration of secondary bile acids but also increases short-chain fatty acids (SCFA) production.…”

Antioxidant activity and chemical composition of essential oils of three aromatic plants from La Rioja province

“…In this context, many aromatic plants, and particularly their essential oils (EOs), are being evaluated for antioxidant activity (AA) (Martins et al, 2014;Mohamed et al, 2013;Quiroga et al, 2011).…”