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Phylogenetic Analysis of Amylase Producing Bacilli from Extrimophillic Environment

D. H. Tambekar and V. R. Dhundale
PG Department of Microbiology, SGB Amravati University, Amravati (MS) India.
Abstract—Culture dependent phenotypic characterization analyses were applied to study the amylase producing bacteria from the Lonar crater. The uniqueness of the Lonar Lake water is its salinity and alkalinity. A total of 55 bacterial strains were isolated from the water and sediment samples collected from the hyperalkalinesaline environment of Lonar crater. These haloalkalitolerant isolates were analyzed by numerical taxonomy techniques by using the average linkage; clustering was achieved using the between groups with averages. Amylase producing fifteen bacterial strains was selected on the basis of their starch hydrolysis activities and studies physiological taxonomy as well as molecular phylogeny. The phenotypic characterization and 16S rRNA indicated that bacterial cultures belongs to genera Bacillus ; species were B. flexus, B. pseudofirmus, B. lehensis , B. circulans, B. agaradhaerens, B. alkalogaya, B. krulwichiae, B. cereus, Bacillus sp AW4(3) and Bacillus sp OBW 3(2) . All these bacterial strains were cultured at pH range 7-12 and 37-50 ¡ãC temperature, most of them showed optimum growth at pH 10 and 45 ¡ãC. These bacterial strains may have biotechnological potential by being useful for the production of amylase.

Index Terms—Amylase, Bacillus, Lonar crater, Numerical taxonomy

Cite: D. H. Tambekar and V. R. Dhundale, "Phylogenetic Analysis of Amylase Producing Bacilli from Extrimophillic Environment," International Journal of Life Sciences Biotechnology and Pharma Research, Vol. 2, No. 1, pp. 103-113, January 2013.
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