Punica Granatum
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Balneo Research Journal DOI: http://dx.doi.org/10.12680/balneo.2015.10100 Vol.6, No.3, Septembrie 2015 Phytochemical screening and antibacterial activity of aqueous leaf extract of Punica granatum Manoj Kumar1,2, Sukumar Dandapat2, Manoranjan Prasad Sinha2 2 Department of Zoology, Ranchi University, Ranchi 834008, Jharkhand (India) 1 Address for correspondence: Department of Zoology, St. Xavier’s College, Ranchi – 834001, Jharkhand (India) Abstract In the present study the leaves of Punica granatum were subjected to phytochemical screening and the impact of the leaf extract of Punica granatum was tested against Bacillus subtilis, Staphylococcus aureus and Salmonella typhi. The phytochemical analysis revealed the presence of various phytochemicals such as alkaloids, tannins, phenols, flavonoid and saponins. Agar disk diffusion method was employed to test the antibacterial activity and the result showed that the aquesous leaf extract of Punica granatum showed 100% inhibition against all the tested bacteria at varying concentration of extract. The Minimum Inhbitory Concentration (MIC) of Punica granatum aqueous leaf extract that showed 100% inhibition was 0.36 mg/ml, 0.13 mg/ml and 0.13 mg/ml in case of Bacullus subtilis, Staphylococcus aureus and Salmonella typhi respectively. Key words: Punica granatum, Salmonella typhi, Staphylococcus aureus, Bacillus subtilis, MIC. Introduction reported to be present in different parts of the Natural products are the source of Punica granatum plant, which makes it synthetic and traditional medicine. medicinally important. Phytochemicals are compounds occurring Owing to the above apprehensions naturally in plants. The use of plants and the present study was undertaken to screen plant products as medicines could be traced the phytochemical constituents and as far back as beginning of human antimicrobial activity of aqueous leaf extract civilization. Plant extracts and compounds of Punica granatum. derived from plants are in use as drug from the ancient times [1]. The Indian Materials and Methods subcontinent has a rich flora of various plants PLANT MATERIALS: the fresh used in traditional medical treatments [2]. tender leaves of Punica granatum was These plants contain different collected. The leaves were washed with bioactive ingredients used to cure disease or deionised water and disinfected with 0.1% relieve pain [3]. HgCl2 solution for 5 min and dried in shade Punica granatum L., commonly away from light for 15 days and ground to known as pomegranate, is a fruit bearing fine powder using electrical grinder and deciduous shrub or small tree, native to Asia sieved [8,9] and belongs to family Lathraceae (Altuner, PREPARATION OF PLANT 2011) [4]. the leaves are shiny and about 7.6 EXTRACT: the fine powder of Punica cm long [5]. Different parts of plants such as granatum was made into thimble for loading leaves, bark, and fruit have medicinal in Soxhlet apparatus and extraction was done significance [6]. Punica granatum has been continuously for 72 hours. The extract thus used as traditional medicine in many obtained was concentrated under vacuum countries for the treatment of dysentery, rotary evaporator and extracts were kept in diarrhoea, helminthiasis, acidosis, desiccators until used [10, 11] hemorrhage etc. [7]. Numerous PHYTOCHEMICAL phytochemical constituents have been SCREENING: phytochemical screening 168 Balneo Research Journal DOI: http://dx.doi.org/10.12680/balneo.2015.10100 Vol.6, No.3, Septembrie 2015 were conducted in Punica granatum leaf extract according to previous published Results and Discussion standards [12, 13] PHYTOCHEMICAL ANTIBACTERIAL ANALYSIS: SCREENING: the results of phytochemical The organisms namely screening is presented in Figure 1.. The - Staphylococcus aureus results showed the presence of various - Bacillus subtilis phytochemicals such as alkaloid, flavonoid, - Salmonella typhi saponin, tannin and phenol. The Were used during the present experiment phytochemicals revealed during the and were procured from Hi-media. These phytochemical screening showed lowest organisms are potential causative agents for concentration of alkaloid (3.07 ± 1.0 mg/ml) different diseases. and highest content of flavonoids (81.16 ± AGAR DISC DIFFUSION METHOD: 0.36 mg/ml). According to Kumar et al. Initially, the stock cultures of bacteria were (2015) [10] the medicinal properties of the revived by inoculating in broth media and plants are due to the presence of the grown at 37 ° C for 48 hrs. The agar plates of secondary metabolites (alkaloids, phenols the above media were prepared and wells etc.) in different parts. The phenols posses were made in plate each plate was inoculated redox properties and thus impart antioxidant with 18h hold cultures (100μ, 104 CFU and properties to the plants in which they are spread evenly on the plate. After 20 min, the present [10]. Tannins, alkaloids, saponins wells were filled with different and flavonoids have been found to be active concentrations of samples. The control wells antibacterial agents [15]. Thus taking into were filled with Gentamycin along with consideration the phytochemicals present in solvent. All the plates were incubated at 37°C the leaf extract, Punica granatum leaf extract for 24 h and the diameter of Zone of appears to be an effective potent Inhibition (ZOI) were noted [14]. antimicrobial agent. MEDIA USED: peptone – 10g, NaCl – 10g and Yeast extract 5g, agar – 20g in 1000 ml of distilled water. 90 80 70 60 50 40 30 20 Concentration(mg/ml) 10 0 Alkaloid Flavonoid Saponin Tannin Total Phenol Phytochemicals Figure 1: Results of Phytochemical screening of aqueous leaf extract of Punica granatum ANTIBACTERIAL ANALYSIS: agar disk diccusion method. The results of The antibacterial activity of Punica antibacterial screening, the agar plates granatum aqueous leaf extract against showing the zone of inhibition (ZOI) of Staphylococcus aureus, Bacillus subtilis and aqueous leaf extract of Punica granatum is Salmonella typhi was determined using the presented in figure 2, and the numerical value of the ZOI is presented as table 1. 169 Balneo Research Journal DOI: http://dx.doi.org/10.12680/balneo.2015.10100 Vol.6, No.3, Septembrie 2015 Table 1: Showing Zone of inhibition (ZOI) in mm and Minimum inhibitory concentration (MIC) against tested microbes Concentration of extract (mg/ml) Bacteria MIC (mg/ml) 0.13 mg/ml 0.36 mg/ml 0.612 mg/ml Bacillus subtilis ND 3 5 0.36 mg Staphylococcus aureus 2.5 6 10 0.13 mg Salmonella typhi 4.6 8.0 14.0 0.13 mg Figure 2: Agar plates showing the Zone of inhibition (ZOI) of aqueous leaf extract of Punica granatum against tested microbes Several phytochemicals have been (eg. Sunusitis), and food poisoning. B. known to possess antimicrobial properties. subtilis is a gram +ve bacteria, found in Tannins, alkaloids, saponins, flavonoids and gastrointestinal tract of ruminants and sterols have been found to inhibit the growth humans. It is also known to cause diseases in of Salmonella typhi [14]. Middleton and several immunocompromised patients. S. Kandaswami (1994) [17] showed that typhi causes typhoid fever, paratyphoid fever flavonoids inhibit several enzymes, chelate in humans. certain metal cation, affects protein The obtained results showed that the phorphorylation. Smith (1996) aqueous leaf extract of Punica granatum was [18]concluded that flavonoids interpose effective as and antibacterial agent against several membrane linked processes. Tannins tested bacteria (Bacillus subtilis, form irreversible complexes with prolene Staphylococcus aureus and Salmonella rich protein resulting in inhibition of cell typhi). The demonstration of antibacterial synthesis in bacteria [11, 16]. The leaf extract activity of aqueous leaf extract of Punica of Punica granatum was found effective granatum is indeed a promising against all the test bacteria. The MIC development, which will help to discover (minimum inhibitory concentration; the new chemical classes (Medicines). concentration of plant leaf extract showing 100 % inhibition) of Punica granatum References aqueous leaf extract in case of B. subtilis, S. 1. Kamal, A. and Khan, M. M. R. (2014), aureus and S. typhi were found to be 0.36 Phytochemical evaluation of some medicinal mg/ml, 0.13 mg/ml and 0.13 mg/ml plants. Indian Journal of Plant Sciences 3(4): respectively. S. aureus is a gram +ve bacteria 5 – 8. found frequently in human respiratory tract 2. Ballabh, B. and Chaurasia, O. P. (2007), and on the skin. It is common cause of skin Traditional medicinal plants of cold desert infections (eg. 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