
Rhizobacteria that promote the plant growth and development are called plant growth promoting rhizobacteria (PGPR). The bacterium under study, belong to PGPR and identified as P. fluorecens strain FP18. The present study deals with heavy metal tolerance capacity of this strain against four heavy metals. The heavy metals used in this study were Zinc sulphate, Arsenic trichloride, Mercuric chloride and Lead nitrate. The isolate exhibited high resistance to heavy metals with minimum inhibitory concentration (MIC) ranging from 50μg/ml to 300μg/ml. Heavy Metal Tolerance study indicated maximum microbial tolerance to Zinc sulphate and lowest to Lead nitrate.