Alkalibacillus weihaiensis Sp. Nov., a Moderately Halophilic Bacterium from Sea Mud of the Yellow Sea, China

Abstract:

A Gram-positive, strictly aerobic, spore-bearing and moderately halophilic bacterial strain HNPHT was obtained from the sea mud sample collected from Jinhaitan Park in Weihai, a city on the shore of the Yellow Sea. Strain HNPHT was bacillus. The optimum growth temperature was 30-36°C and the optimum pH was 6.5-9.5. It could grow well at 5-20% salt concentration. The G+C content of its genomic DNA was 37.0%. 16S rRNA gene sequence indicated a close relationship to Alkalibacillus halophilus (DQ359731) and Alkalibacillus salilacus (AY671976) with similarity of 99%. However, they had obvious difference in whole-cell main fatty acid components, cell size, cell morphology, colony color, motility, oxidase, gelatine liquification, nitrate reduction, NaCl tolerance range, pH tolerance range, G+C mole fraction, sole carbon source, sole nitrogen source, antibiotic sensitivity and a source of the strain isolation. A comparison of these taxonomic characters of strain HNPHT with those of some type strains of the genus Alkalibacillus indicated that the strain could be distinguished from A. halophilus and A. salilacus. In view of multiple identification results, it was proposed that strain HNPHT was classified as the type strain of a new species of the genus Alkalibacillus under the name Alkalibacillus weihaiensis sp. nov..

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 16-22
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.16
• Online since: May 2012
• Authors: Wei Guo Li, Fang Ma, Song Wen Tan, Li Wei, Zhong Xu, Guang Yu Wang
• Keywords: Alkalibacillus weihaiensis sp. nov., Phylogeny, Taxonomy

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