International Journal of Bio-Technology and Research (IJBTR) ISSN (P):2249-6858; ISSN (E):2249-796X Vol. 10, Issue 1, Jun 2020, 49-62 Š TJPRC Pvt. Ltd.
ANALYSIS OF PHYTOCHEMICALS, ANTIBACTERIAL AND ANTIOXIDANT ACTIVITIES OF CERTAIN MEDICINAL PLANTS OF GARHWAL AGAINST HUMAN PATHOGENS Dr. JYOTI MEHTA* & IFFET AARA Department of Microbiology, Uttaranchal College of Science and Technology, Uttarakhand, India ABSTRACT Background and purpose:Medicinal plants are a source of invaluable bioactive constituents, which form the backbone of traditional medicines. The use of plant extracts and phytochemical compounds, both with known antimicrobial potential, can be of great significance in therapeutic purposes. The present study was designed to assess the phytochemical composition, antibacterial and antioxidant activities of medicinal plant extracts. Material and Methods: Five medicinal herbs (Ficus religiosa, Ficus benghalensis, Cannabis sativa, Hibiscus rosasinensis, and Terminalia chebula) were collected from Kulhan area of Dehradun (Uttarakhand) and their ethnomedicinal data were gathered from traditional healers and elders of the study area. Plant extracts were made by using solvents methanol, ethanol and chloroform in an orbital shaker. Extraction yield and phytochemical analysis was performed using standard
Gram-negative bacteria (E. coli and Shigella spp) and3 Gram-positive bacteria (S. epidermidis, B. cereus and S. aureus) by well diffusion technique. In most of the cases, inhibition of bacterial growth was proportional to extract concentrations. The free radical scavenging activity of the extracts was screened by 1, 1-diphenyl-2-picrylhydrazyl (DPPH) assay. Results:Lowest amount of extraction yield was obtained in methanol extract of H. rosasinensis (7.18%) and maximum yield was found in F. religiosa methanol extract (37.36%). All plants exhibited antimicrobial properties
Original Article
phytochemical procedures. Antibacterial activities of plant extractswere evaluated at 100, 150 and 200 mg/ml against 2
against one or more of the tested pathogens but T.chebula extracts were found most active against test pathogens and were further tested for antioxidant property. The antioxidant capacity showed maximum activity in the methanolic extract of T.chebulaat concentrations 100, 200, 300, 400 and 500 Âľg/ml and the percent inhibition of writhing response by the extract was 47.04%, 57.61%, 65.28%, 78.13%, and 92.43% respectively. T. chebula fruit could be potential sources of new antimicrobial and antioxidant agents. CONCLUSIONS These findings confirmed that the methanol extract of T.chebula fruit is rich in bioactive phytochemical compounds and might be a promising source of antimicrobial compounds as well as antioxidant activity.T. chebula may act as a possible antioxidant compound for biological systems susceptible to free radical-mediated reactions. KEYWORDS: Antibacterial Agents, DPPH, Free Radical Scavenger & Plant Extracts
Received: Oct 22, 2019; Accepted: Nov 12, 2019; Published: Jan 31, 2020; Paper Id.: IJBTRJUN20205
1. INTRODUCTION Garhwal Himalayas are a rich in a variety of medicinal plants. Biodiversity is blessed with a perennial source of medicinal plants, which contributed in thedevelopment of drug discovery[1] for treating human and animal disease that depends mainly on natural products obtained from plants, animals, minerals and microorganisms. According to the previous estimations, out of 20% plant species studied scientifically worldwide, only about 6% are screened
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