Evidence of heat-resistant microorganisms with a special emphasis on filamentous Actinomycetes in hyper-arid soils of Gandom Beryan area, Lut Desert, Iran

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MAZKOUR SOMAYE; HOSSEINZADEH SAEID; SHEKARFOROUSH SEYED SHAHRAM

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Journal: Iranian Journal of Microbiology Year:2017 | Volume:9 | Issue:6 Page(s): 331-337

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Title

Evidence of heat-resistant microorganisms with a special emphasis on filamentous Actinomycetes in hyper-arid soils of Gandom Beryan area, Lut Desert, Iran

Author(s)

MAZKOUR SOMAYE | HOSSEINZADEH SAEID | SHEKARFOROUSH SEYED SHAHRAM | Issue Writer Certificate

Keywords

Lut Desert

Heat-resistant microorganism

filamentous Actinomycetes

Abstract

Background and Objectives: In the present study, the Lut Desert, Iran was chosen as one of the hottest places in the world (with the recorded temperature of 70. 7° C during 2003-2009) to find out whether any Heat-resistant microorganisms were present in the soil. Materials and Methods: The samples were collected from surface and depth of three identified places of Gandom Beryan in the Lut Desert. Chemical analysis and enumeration of the total bacteria, yeasts and molds were performed. Four selective culture media were employed to isolate the filamentous Actinomycetes. The suspected colonies were further confirmed using PCR assay. Then the culture cell-free-supernatants (CFS) of isolates were used to investigate their antimicrobial activity against Staphylococcus aureus, Bacillus cereus, Salmonella Typhimurium and Escherichia coli. Results: Chemical analysis of the samples included moisture (0. 2-0. 9%), ash (85-91%), organic materials (8. 3-14. 4%), pH (7. 59-9. 40) and electrical conductivity (380-2000 μ S/cm). The number of isolated bacteria and molds varied from 0-20 to 0-40 CFU/g, respectively. Number of Actinomycetes isolated from the soil samples were between 0-12. 2 CFU/g. Nine isolated colonies were identified as filamentous Actinomycetes. To determine the possibility of antimicrobial peptides, the CFS (cell-free supernatant) was firstly neutralized by NaOH and catalase. The results showed that none of the CFS of the isolates was effective against E. coli, S. Typhimurium and S. aureus, while the maximum inhibitory effect was investigated on B. cereus, which was 33. 1%± 1. 19% (mean ± SD). Conclusion: The results of the current study imply the presence of rare Heat-resistant microorganisms in the soil of Gandom Beryan which may be further used to find out more about the function of natural bioactive compounds. Actinomycetes, as extremophile microorganisms, have shown the greatest genomic and metabolic diversity, as such the discovery of the novel Actinomycetes as a source of secondary metabolites is essential.

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APA: Copy

MAZKOUR, SOMAYE, HOSSEINZADEH, SAEID, & SHEKARFOROUSH, SEYED SHAHRAM. (2017). Evidence of heat-resistant microorganisms with a special emphasis on filamentous Actinomycetes in hyper-arid soils of Gandom Beryan area, Lut Desert, Iran. IRANIAN JOURNAL OF MICROBIOLOGY, 9(6), 331-337. SID. https://sid.ir/paper/315536/en

Vancouver: Copy

MAZKOUR SOMAYE, HOSSEINZADEH SAEID, SHEKARFOROUSH SEYED SHAHRAM. Evidence of heat-resistant microorganisms with a special emphasis on filamentous Actinomycetes in hyper-arid soils of Gandom Beryan area, Lut Desert, Iran. IRANIAN JOURNAL OF MICROBIOLOGY[Internet]. 2017;9(6):331-337. Available from: https://sid.ir/paper/315536/en

IEEE: Copy

SOMAYE MAZKOUR, SAEID HOSSEINZADEH, and SEYED SHAHRAM SHEKARFOROUSH, “Evidence of heat-resistant microorganisms with a special emphasis on filamentous Actinomycetes in hyper-arid soils of Gandom Beryan area, Lut Desert, Iran,” IRANIAN JOURNAL OF MICROBIOLOGY, vol. 9, no. 6, pp. 331–337, 2017, [Online]. Available: https://sid.ir/paper/315536/en

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