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Introduction of a New Species of Moderate Halophilic Bacteria Called Oceanobacillus Longus

Moderate halophilic bacteria are a kind of microorganisms whose optimum growth medium should contain 0/5 – 2/5 molar sodium Coloride salt. Examples of such bacteria are found in different genus such as Halumonas, marinobacteria,halobacillus, saline vibrio, Philobacillus, Lentic bacillus and others.

“This group of microorganisms produce valuable industrial compounds such as carotenoids, biopolymers and hydrolytic enzymes which activate in a different range of salt densities, temperature and PH. The biotechnological potential of halophilia and the distribution of salty habitats around the world have led to the introduction of a new taxa of these microorganisms over the past decades,”Dr. Shahzadeh Fazeli, the head of IBRC, said about this new species.

“The new taxon – Oceanobacillus longus – gram positive bacterium is an endospore forming, long rod, aerobic and moderately halophilic bacterium which was isolated from the hyper saline lake Aran-Bidgol in Iran. Cells of this strain are motile and produce colonies with brown pigment, “he added.

“This bacterium grows in salty destiny by 1 to 20%. But the optimum salt destiny for growth is 5%. The optimum growth temperature of this bacterium is 35 cand optimum PH is 7. Phylogenetic analysis based on gene sequencing of 165rRNA showed that the bacterium belongs to Oceanobacillus genus. It contains predominant Manacquinone MK-7 keinon and mezo-diamino acid peptidoglycan. The G+C content (of the genomic DNA) in this bacterium is 42.9 mole% and the DNA – DNA hybridization shows that this bacterium differentiate from other members of the genus Oceanobacillus and is distinct,”Dr. Fazeli noted.

This native microorganism with the access number IBRC – M10703 is preserved in the Microorganism Bank of Iranian Biological Resource Center and is available to respectable students and researchers throughout the country.

It should be noted that this is fifty-thirds species discovered by this center.


08:48 - 20/12/2017    /    Number : 165    /    Show Count : 372