In the present study, soil samples were collected from ten different locations and the physico chemical properties & microbial population of the soil samples were analyzed. The PGPR organisms viz., Azospirillum, Pseudomonas, Azotobacter and Bacillus were isolated from ten different soil samples purified and maintained for further studies. The PGPR isolates of Pseudomonas, Azospirillum, Azotobacter and Bacillus were screened for there efficiency by determining the ability to produce phytohormone IAA, N fixation and phosphorus solubilization. The selected PGPR isolates viz., Azs-2, Ps-2 and...

In the present study, a fungal strain was isolated from tannery effluent which showed the chromium resistant activity and was identified as Penicillium chrysogenum and Aspergillus niger. Penicillium chrysogenum showed very high level chromium resistance of 800 ug/ml by Agar dilution method when compared to Aspergillus niger. The minimal inhibitory concentration of chromium was found to be 512 ug/ml of potassium dichromate in Sabouraud's dextrose broth medium. The chromium uptake was significantly high in live pellet cells than killed pellet cells at 540 nm in different time intervals....

The paddy rhizosphere soil sample was collected from 10 locations in Cuddalore district of Tamil Nadu. The Pseudomonas fluorescens isolates were characterized by Gram staining, motility test, plating on selective medium and performing biochemical tests. The Pseudomonas fluorescens isolates were designated as PF -1 to PF - 10. The ten Pseudomonas fluorescens isolates obtained from the rhizosphere of paddy were tested for their efficiency of plant growth promoting substance production. Maximum production was recorded by the isolate PF-8 and minimum production was found in PF-4. The...