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Isolation and Characterization of Halophilic and Halotolerant Bacteria from Urmia Lake after the Recent Drought Disaster in 2015

Author(s):

Elham Kazemi, Vahideh Tarhriz, Mohammad Saeid Hejazi* and Mohammad Ali Amoozegar   Pages 1 - 9 ( 9 )

Abstract:


Background: Due to the last two decades drought disaster, which resulted the loss of main part of Urmia Lake water and changed the natural conditions of an environment especially ionic strength.

Objective: We aimed to isolate and characterization of halophilic and halotolerant bacteria in Urmia Lake, Iran, 2015. Urmia Lake is a permanent and salty inland lake located in the Azerbaijan region in northwestern Iran.

Method: Sampling was carried out in multiple water-filled locations of the lake. Liquid basal media for the enrichment of bacteria was successively applied and colonies were isolated by plating method. Isolates were then differentiated based on differences in colony, Gram staining, microscopic shape, and biochemical properties.

Results: One chemolithotrophic isolate belonging to Thiobacillus thioparus and 41 heterotrophic isolates were obtained. The 16S rRNA gene sequences showed that all 42 isolates belong to the genera Kocuria (21.42%), Marinobacter (11.90%), Micrococcus (11.90%), Thalassobacillus (11.90%), Bacillus (11.90%), Halomonas (7.14%) and Thiobacillus (2.38%).

Conclusion: Based on 16S rRNA similarity, 5 of 41 isolates showed the potential to be introduced as new species. The dominant genera with abounded frequency were found to be Kocuria, Bacillus and Thalassobacillus genera.

Keywords:

Aquatic bacteria, chemolithotrophic, Kocuria, Thalassobacillus

Affiliation:

Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Molecular Medicine Research Center, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran



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