Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol. 17 Special Issue 2015; Page No.(155-158)

PLANT GROWTH PROMOTING RHIZOBACTERIA (PGPR) CELLS MEDIATED ANTIBACTERIAL ACTIVITY IN THE EXTRACTS OF ANDROGRAPHIS PANICULATA

M. ANIS KUMAR, U. SAKTHIVEL AND P. SELVAMANI

Abstract

Andrographis paniculata is a potent medicinal plant in the Indian systems of medicine. Traditionally the leaves are used as/in influenza, bronchitis, gonorrohea, cholera, fertility and antibacterial, anticancer, antidiabetic, anti-inflammatory and anti snake venom etc. In the present study deals with the plant growth promoting rhizobacteria (PGPR) cells mediated extracts of the leaves, stem, root and whole plant of Andrographis paniculata were tested against five human bacterial pathogens by using four various solvent namely, ethanol, methanol, acetone and chloroform by disc diffusion method. The maximum antibacterial activity was noted in chloroform extract of leaves showed activity against Klebsiella pneumonia (15 mm) and the minimum was recorded in ethanol stem extracts against Bacillus subtilis (4 mm) and Klebsiella pneumonia (6 mm). The maximum antibacterial activity recorded in chloroform roots extracts against Escherichia coli (19 mm). The minimum activity was noted in acetone stem extracts against Psudomonas aeruginosa (5 mm) and Staphylococcus aureus (4 mm). The root extract showed more inhibitory effect than the leaf extracts. The results of our antibacterial assay revealed that plant extracts showed inhibitory activity against the tested organisms.

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