The Potential of Using Phosphate-Solubilizing Bacteria as a Controlled-Release Biofertilizer Under Salt Stress Conditions
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View abstract on PubMed
Summary
This summary is machine-generated.Encapsulated Priestia megaterium PN18 shows potential as a biofertilizer for saline soils. The bacterial capsules maintain phosphate-solubilizing activity under high salinity, improving phosphorus availability for crops.
Area Of Science
- Agricultural Microbiology
- Soil Science
- Biotechnology
Background
- Phosphorus deficiency is a major constraint on crop productivity in saline soils, despite high total phosphorus content, due to low bioavailability.
- Saline soils require innovative solutions to enhance nutrient availability and support agricultural output.
Purpose Of The Study
- To evaluate the phosphate-solubilizing capabilities and salt tolerance of Priestia megaterium PN18.
- To assess the efficacy of encapsulated PN18 as a biofertilizer for improving phosphorus availability in saline environments.
Main Methods
- Assessed biofilm formation, exopolysaccharide (EPS) production, and sodium uptake of PN18 under varying NaCl concentrations (0.0–2.0 mol L⁻¹).
- Formulated and characterized PN18-loaded capsules using sodium alginate and calcium chloride.
- Evaluated the phosphate-solubilizing activity of free and encapsulated PN18 under different salinity levels.
Main Results
- Biofilm formation decreased with salinity, while EPS production and sodium uptake increased, peaking at 1.2 mol L⁻¹ NaCl.
- Encapsulated PN18 maintained significant phosphate-solubilizing activity even at 2.0 mol L⁻¹ NaCl.
- Free PN18 showed higher initial solubilization but its efficiency drastically reduced above 0.4 mol L⁻¹ NaCl, unlike the encapsulated form.
Conclusions
- Priestia megaterium PN18 exhibits robust phosphate-solubilizing potential and salt tolerance.
- Encapsulation enhances the stability and efficacy of PN18 as a biofertilizer in high-salinity conditions.
- PN18 capsules offer a promising strategy for controlled phosphorus release, improving soil fertility in saline agricultural lands.
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