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Int J Syst Evol Microbiol 57 (2007), 770-774; DOI  10.1099/ijs.0.64713-0
© 2007 International Union of Microbiological Societies

Alkalibacillus silvisoli sp. nov., an alkaliphilic moderate halophile isolated from non-saline forest soil in Japan

Ron Usami1, Akinobu Echigo1, Tadamasa Fukushima1, Toru Mizuki1, Yasuhiko Yoshida1 and Masahiro Kamekura2

1 Department of Applied Chemistry, Faculty of Engineering, and Bio-Nano Electronics Research Centre, Toyo University, 2100 Kujirai, Kawagoe, Saitama 350-8585, Japan
2 Halophiles Research Institute, 677-1 Shimizu, Noda, Chiba 278-0043, Japan

Correspondence
Akinobu Echigo
dc0400017{at}toyonet.toyo.ac.jp

Two alkaliphilic, moderately halophilic bacteria, designated BM2T and HN2, were isolated from non-saline forest soil in Japan. The cells of strain BM2T were motile, aerobic, rod-shaped and Gram-positive. The peptidoglycan was of the A1{gamma} type, and the diamino acid was meso-diaminopimelic acid. Growth was observed at NaCl concentrations between 5.0 and 25.0 % (w/v) (the optimum being 10.0–15.0 %, w/v), at pH 7.0–10.0 (optimum, pH 9.0–9.5) and at 20–50 °C. The predominant isoprenoid quinone was MK-7. The major cellular fatty acids were iso-C15 : 0 and anteiso-C17 : 0. The G+C content of total DNA of strain BM2T was 37.0 mol%. Phylogenetic analysis of the 16S rRNA gene sequence showed that strain BM2T was most closely related to Alkalibacillus haloalkaliphilus DSM 5271T (98.0 % sequence similarity). DNA–DNA hybridization results indicated low levels of relatedness between strain BM2T and A. haloalkaliphilus JCM 12303T (23 and 16 % reciprocally), Alkalibacillus filiformis JCM 13893T (25 and 21 %) and Alkalibacillus salilacus JCM 13894T (27 and 19 %). On the basis of the phylogenetic and phenotypic characteristics, strain BM2T represents a novel species, for which the name Alkalibacillus silvisoli sp. nov. is proposed. The type strain is BM2T (=JCM 14193T=DSM 18495T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains BM2T and HN2 are AB264528 and AB267380, respectively.






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