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ASSESSMENT OF ANTIBACTERIAL AND ANTIFUNGAL ACTIVITIES OF THE EXTRACTS OF RHYNCHOSTYLIS RETUSA BLUME- A MEDICINAL ORCHID
Bakul Bhattacharjee and S. M. Shahinul Islam*
ABSTRACT
Rhynchostylis retusa is a monopodial, epiphytic and medicinal orchid. The phytochemical screening and antimicrobial activities of different extract (methanol, ethanol, chloroform and hexane) of Rhynchostylis retusa was applied on five different bacteria (gram positive: Staphylococcus aureus & Bacillus subtilis; gram negative: Vibrio cholerae, Escherichia coli & Klebsiella pneumonia) and three fungus species (Penicillium sp., Rhizopus sp. and Aspergillus niger). The antmicrobial activity was assessed using disc diffusion method. A preliminary phytochemical screening was performed on the basis of detection of alkaloid, terpenoids, flavonoids, tannins, steroids, coumerins, amino acides and carbohydrates. Under this study methanol, ethanol and chloroform extracts from Rhynchostylis retusa Keywords: Rhynchostylis retusa, phytochemical, antimicrobial, disc diffusion method. [Download Article] [Download Certifiate] |