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Characterization of halophilic bacteria from environmental samples of Pulicat brackish water lake

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Title Characterization of halophilic bacteria from environmental samples of Pulicat brackish water lake
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Creator Sahay H, Singh S, Kaushik R, Saxena AK and Arora DK
 
Subject hydrolytic enzymes halophilic bacteria phylogenetic analysis sequencing
 
Description Not Available
Culture dependent phenotypic characterization and 16S rDNA based phylogenetic analyses were applied to study the aerobic halophilic bacterial population present in the Pulicat brackish-water Lake of India. Five different media were employed for isolation of bacteria. A total of 198 morphotypes were recovered, purified and screened for salt tolerance in nutrient agar medium amended with 5–25% NaCl. Based on 16S rDNA restriction fragment length polymorphism analysis with three restriction endonucleases, 51 isolates tolerant to 5% or more NaCl were grouped into 29 clusters. Phylogenetic analysis using 16S rRNA gene sequences revealed that 29 strains could further be allocated into two clades: 19 to Firmicutes and 10 to γ-Proteobacteria. Firmicutes included low G+C Gram-positive bacteria related to family Bacillaceae, which included five genera Bacillus, Virgibacillus, Rummelibacillus, Alkalibacillus and Halobacillus. Another genera included in Firmicutes was Salimicrobium halophilum. In the γ-Proteobacteria group, all the isolates belonged to one genus Halomonas, represented by six different species Halomonas salina, H. shengliensis, H. salifodinae, H. pacifica, H. aquamarina and H. halophila. Most of the isolates exhibited cellulase, xylanase, amylase and protease activities.
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Date 2021-11-01T10:25:43Z
2021-11-01T10:25:43Z
2011-01-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/66751
 
Language English
 
Relation Not Available;
 
Publisher Springer