Solubilizing efficiency of inorganic phosphate and insoluble organic phosphorus by cyanobacteria isolated from fish Culture ponds

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Fallah Ali Reza; Alishiri Junaghani Mostafa; Bazazzadeh Roya

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Journal Paper

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Journal: Journal of Soil Biology Year:2023 | Volume: | Issue: Page(s): 155-165

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Information Journal Paper

Title

Solubilizing efficiency of inorganic phosphate and insoluble organic phosphorus by cyanobacteria isolated from fish Culture ponds

Author(s)

Fallah Ali Reza | Alishiri Junaghani Mostafa | Bazazzadeh Roya | Issue Writer Certificate

Keywords

calcium phytateQ4

cyanobacteriaQ4

phosphate solubilizerQ4

tricalcium phosphateQ4

Abstract

Phosphorus plays a crucial role in aquatic ecosystems, serving as a vital nutrient that promotes the growth and enrichment of freshwater environments, particularly in warm-water fish ponds. It exists in various forms within aquatic systems, both soluble and insoluble. cyanobacteria, a diverse group of oxygen-producing, photosynthetic prokaryotes, possess phosphatase activities that convert phosphorus into a soluble form. Thus, this study aimed to isolate, identify, and examine the phosphorus-dissolving capabilities of cyanobacteria found in fish culture ponds at a laboratory scale. The study evaluated the phosphorus dissolution efficiency of four cyanobacterial strains isolated from warm-water fish ponds: Chroococcus sp., Oscillatoria sp., Microcystis sp., and Gloeocapsa sp., using two phosphorus sources, tricalcium phosphate and calcium phytate, in both floating surface and biomass portions. The findings indicated that Microcystis sp. was particularly effective, dissolving 47.5 mg/liter of tricalcium phosphate and 67.3 mg/liter of calcium phytate in the floating portion. In the biomass, Gloeocapsa sp. demonstrated the highest efficiency in dissolving phosphorus from both tricalcium phosphate and calcium phytate, with concentrations of 35.5 mg/liter and 18.7 mg/liter, respectively. However, the study observed no significant difference in cyanobacterial growth under varying phosphorus concentrations and sources across the experimental groups. The research highlights that certain cyanobacteria isolated from fish culture ponds possess the capacity to dissolve phosphorus to a notable extent when provided with sufficient sources of insoluble phosphorus.

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