Abstract
Isolation, Characterization and Genetic Studies on Isolates of Phosphate Solubilizing Bacteria in Egyptian Calcareous Soils
Highlights
Phosphate (P) is one of the most important elements for plant growth
Thirty-two bacterial isolates were obtained from two samples in PKV medium
Results presented in this study show that 68.5% of the Phosphate Solubilizing Bacteria (PSB) isolates produced detectable levels of Indole Acetic Acid (IAA) in culture supernatants
Summary
Phosphate (P) is one of the most important elements for plant growth. It is abundant in soils in both organic and inorganic forms, its availability is limited to plants as it presents mostly in insoluble forms [1]. Chemical fertilizers are added to the soils, plants can only utilize few amounts of phosphoric fertilizers, which are quickly converted into insoluble forms. Chemical fertilizers are frequently applied during crop planting, but its regular use is costly and produces undesirable environmental impacts, such as soil and water contamination. P is often regarded a limiting nutrient in agricultural soils [2,3]. Soil microorganisms play a great role in availability of phosphate to plants [4]
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