Assessment of the Plant Growth Promotion and Phosphorus Solubilization by Rhizosphere Bacteria Isolated from Troporthents Soils of Bay Island

Plant Growth Promoting Rhizobacteria (PGPR) enhances seed germination and plant growth via various plant growth promoting substances as well as biofertilizers particularly in vegetable crops. But, native PGPR as biofertilizers are more efficient as they are well adapted to the tropical hot and humid island conditions with acidic soil pH as in the case of Troporthents soils. In the present study among the four isolates tested using brinjal as test crop, Bacillus subtilis and B. cereus were identified as efficient phosphorus solubilizers having growth promotion effect by production of IAA. All the isolates promoted root and shoot growth of brinjal seedlings and B. subtilis is highly significant in promoting seed germination.