Prospects of Using Phosphate Solubilizing Pseudomonas as Bio Fertilizer

Phosphorus deficiency is a major constraint to crop production due to rapid binding of the applied phosphorus into fixed forms not available to the plants. This work was carried out to explain the release of soluble phosphates and its effect on plant growth as a function of phosphate solubilization by fluorescent Pseudomonas. In the current study, Pseudomonas fluorescens K 34 solubilized tricalcium phosphate and produced substantial amount of soluble phosphorus (968.5 mg / l) in Pikovskaya ‘s (PVK) broth as compared to others and exhibited the production of indole acetic acid (IAA), siderophore, cell wall degrading enzyme activities and growth inhibition against fungal and bacterial pathogens. Thus, the ability of performing multifarious plant growth promoting activities together suggested uniqueness of Pseudomonas fluorescens K -34 and its potential use in developing a cost effective eco friendly multifunctional bio fertilizer and bio control agent in agriculture.