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Brachybacterium saurashtrense sp. nov., a halotolerant root-associated bacterium with plant growth promoting potential.
Int. J. Syst. Evol. Microbiol. 61, 2799-2804 (2011)
A Gram-positive, aerobic, non-motile, coccoid shaped, halotolerant bacterium (JG 06 T) was isolated from roots of Salicornia brachiata, an extreme halophyte. Phylogenetic analysis based on 16S rRNA gene sequence showed sequence similarities of 99.2% to Brachybacterium paraconglomeratum, 99.0% to B. conglomeratum, and 98.2% to B. faecium. DNA-DNA hybridization with the close relatives Brachybacterium paraconglomeratum (DSM 46341T), B. conglomeratum (DSM 10241 T), B. faecium (DSM 4810T), B. tyrofermentans (DSM 10673 T), B. alimentarium (DSM 10672 T), B. fresconsis (DSM 14564 T), B. sacelli (DSM 14566 T) and B. muris (DSM 15460 T) resulted in re-association values of 36.2%, 36.5%, 35.8%, 27.6%, 27.9%, 28.2%, 28.7% and 11.2%, respectively. The peptidoglycan type of strain JG 06 T was variant A4γ. The menaquinone content was MK7 (100%). The polar lipid profile consisted of diphosphatidyglycerol, phosphatidyglycerol, monogalactosyl diglyceride and three unidentified phospholipids and three glycolipids. The predominant fatty acid was anteiso-C15:0 (52.07%); significant amounts of iso-C16:0(12.38%), iso-C15:0(8.59%) and anteiso-C17:0(10.03%) were also present. The G+C content of DNA was 73.0 mol%. The strain formed a growth pellicle in nitrogen-free semisolid NFb medium containing NaCl up to 4% and reduced acetylene to ethylene, characteristic for N2 fixation. In nutrient broth medium it grew up to 15% NaCl. It also had the ability to produce IAA, siderophore, utilized ACC as sole source of nitrogen and possessed ACC deaminase enzyme. On the basis of physiological, biochemical data and phylogeny, strain JG 06 T should be placed in the genus Brachybacterium. This bacterium represents a novel species of genus Brachybacterium for which the name Brachybacterium saurashtrense sp. nov. is proposed, with type strain JG 06 T (= DSM 23186T = IMCC 252T).
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
no Keywords
ISSN (print) / ISBN
1466-5026
e-ISSN
1466-5034
Quellenangaben
Volume: 61,
Issue: 12,
Pages: 2799-2804
Publisher
SGM
Publishing Place
Reading
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Research Unit Microbe-Plant Interactions (AMP)