Pseudomonas fluorescens is a phosphate solubilizing bacterial species that can be used to make biofertilizers. It can be isolated from plant rhizospheres and is considered a plant growth-promoting rhizobacterium (PGPR) because it can increase the availability of phosphorus in plants. This can help sustain the health and productivity of crops,Strains from the genera Pseudomonas, Bacillus and Rhizobium are among the most powerful phosphate solubilizers. The principal mechanism for mineral phosphate solubilization is the production of organic acids, and acid phosphatases play a major role in the mineralization of organic phosphorous in soil.

Crop Growth and Development

Phosphorus (P) is a vital biogenic element that plays a crucial role in the biosynthesis of various compounds, such as phytic acid, nucleic acid, and phospholipids, in plants . It is closely intertwined with key metabolic processes, including nitrogen (N) and carbon (C) metabolism, as well as photosynthesis, thereby exerting a positive influence on crop growth and development. Insufficient P nutrition in crops hinders the biosynthesis of nucleic acid, phospholipids, and triphosphate nucleotides, thereby affecting cell division, energy conversion, and cellular respiration, ultimately leading to a reduction in the photosynthetic rate

Disease controll

This is a bacterium effectively used in controlling sheath blight and blast of paddy, wilt diseases of redgram, and banana. Pseudomonas fluorescens is a gram negative, rod shaped nonspore forming bacteria which may be mono or lopotrichous or non-motile. It produces greenish, fluorescent and water soluble pigment, pyoverdin. The direct influence of pseudomonas on plant growth is mediated either by release of auxin-like substances or through improved uptake of nutrients in the environment.