Screening and Identification of Heat Resistant Phosphate Solubilizing Bacteria

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Khoshru b.; SARIKHANI M.R.

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Journal: Water and Soil Science Year:2020 | Volume:30 | Issue:2 Page(s): 1-14

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Information Journal Paper

Title

Screening and Identification of Heat Resistant Phosphate Solubilizing Bacteria

Author(s)

Khoshru b. | SARIKHANI M.R. | Issue Writer Certificate

Keywords

Phosphatic microbial fertilizerQ2

Phosphate solubilizing bacteriaQ1

Thermal toleranceQ2

ViabilityQ1

Abstract

Bacteria with high phosphate solubility and resistance to high temperature are suitable candidates for use in granular Phosphatic microbial fertilizers (PMF). The prepared product in processing of these fertilizers (PMF) is exposed to high temperatures (50-55 ° C) under very low moisture conditions. Accordingly, in this research, the efficiency of phosphate dissolution and temperature tolerance of 150 bacterial isolates were evaluated. These bacteria were prepared in the soil biology laboratory of University of Tabriz. The phosphate solubility of these bacteria was evaluated by semi-quantitative and quantitative methods in solid and liquid Sperber medium in the presence of low-soluble tricalcium phosphate (TCP) source at the temperatures of 28 ° C and 55 ° C. The results showed that there was a significant difference between bacteria in terms of dissolution of phosphate. At a typical temperature among 150 bacteria, 25 bacteria (17%) had no phosphorus dissolution capacity, and the HD/CD ratio for these 25 bacteria was 1. 2 to 2. 8. In the quantitative method, the solubility potential of 25 isolates was 175. 88-292. 98 mg P/l. Among the 25 isolates, only 7 bacteria were able to survive at 55 ° C for 16 hours, witch between them the C1-4O, C19-4O and C8-12M bacteria had the highest halo diameters with values of 2. 5, 2. 4 and 2. 2 for the HD/CD ratio, respectively. The amounts of phosphorus release by these bacteria in the liquid medium were 244. 08, 256. 44 and 216. 14 mg/l, respectively. The molecular identification of these bacteria showed that they were belonged to the genus Enterobacter and Stenotrophomonas.

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APA: Copy

Khoshru, b., & SARIKHANI, M.R.. (2020). Screening and Identification of Heat Resistant Phosphate Solubilizing Bacteria. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), 30(2 ), 1-14. SID. https://sid.ir/paper/411216/en

Vancouver: Copy

Khoshru b., SARIKHANI M.R.. Screening and Identification of Heat Resistant Phosphate Solubilizing Bacteria. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE)[Internet]. 2020;30(2 ):1-14. Available from: https://sid.ir/paper/411216/en

IEEE: Copy

b. Khoshru, and M.R. SARIKHANI, “Screening and Identification of Heat Resistant Phosphate Solubilizing Bacteria,” WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), vol. 30, no. 2 , pp. 1–14, 2020, [Online]. Available: https://sid.ir/paper/411216/en

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