Academic journal article Iranian Journal of Public Health

Study of the Phytase Producing Bacteria Effects on Phosphorus Availability for Maize Plants

Academic journal article Iranian Journal of Public Health

Study of the Phytase Producing Bacteria Effects on Phosphorus Availability for Maize Plants

Article excerpt

Background: Phosphorus (p) is an essential macroelement for plants and its deficiency is frequent in many regions espe- cially acidic soils. Soil microorganisms play a key role in the dynamic of soil P and can increase its availability for plants by various ways, such as mineralization of organic P using different processes including production and release of or- ganic acids, phosphates and phytase. These bacteria were used as bio-fertilizer since 1950.

Methods: In this research, the efficiency of bacterial strains isolated from different soils for evaluation of phytase releas- ing potential has been studied. Phytase releasing bacterial strains were isolated from different areas soils around Tabriz and identified using molecular methods. The isolated strains were cultivated on specific culture media (liquid PSM) and their phytase activity was measured at various times. In this study, after isolation and purification of phytase-positive bac- teria from soil in specific media, the high efficient strains were selected, proliferated and added to a sterile soil. Exper- iment was conducted in a completely randomized design and the maize plants were cultivated in the control and inoculated soil. Maize plants were cultivated for 28 days in soil inoculat- ed with phytase releasing bacterial strains, which were isolat- ed from different soils and study of the bacterial effects on growth parameters, dry and weights roots and shoots of maize plants was performed. …

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