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Shewanella electrodiphila sp nov., a psychrotolerant bacterium isolated from Mid-Atlantic Ridge deep-sea sediments

Lookup NU author(s): Jinwei Zhang, Professor Grant Burgess

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Abstract

Strains MAR441(T) and MAR445 were isolated from Mid-Atlantic Ridge sediments from a depth of 2734 m, and were found to belong to the genus Shewanella. The strains were rod-shaped, pigmented, non-motile and capable of anaerobic growth either by fermentation of carbohydrates or by anaerobic respiration. The strains utilized a variety of electron acceptors, including nitrate and ferric compounds, and could utilize peptone when grown anaerobically in a two-chambered microbial fuel cell, which used carbon cloth electrodes and delivered a stable power output of similar to 150-200 mW m(-2). The major fatty acids were typical of the genus Shewanella, with major components C-13: 0, iSO-C-13: 0, iSO-C-15: 0, C-16 :0,C- C-16: (1)omega 7C, C-18 : 1 omega 7c and C-20 :5 omega 3 fatty acids. The DNA G+C content of strains MAR441(T) and MAR445 was 42.4 mol%. 16S rRNA gene sequence analysis indicated that strains MAR441(T) and MAR445 were most closely related to Shewanella olleyana (sequence similarities 97.9 % to the type strain). DNA DNA hybridization demonstrated only 15.6-37.2 % relatedness between strain MAR441(T) and the type strains of related species of the genus Shewanella. Phenotypic characteristics confirmed that these isolates constituted a novel species of the genus Shewanella, for which the name Shewanella electrodiphila sp. nov. is proposed; the type strain is MAR441(T) (=ATCC BAA-2408(T)=DSM 24955(T)).


Publication metadata

Author(s): Zhang JW, Burgess JG

Publication type: Article

Publication status: Published

Journal: International Journal of Systematic and Evolutionary Microbiology

Year: 2015

Volume: 65

Pages: 2882-2889

Print publication date: 01/09/2015

ISSN (print): 1466-5026

ISSN (electronic): 1466-5034

Publisher: Society for General Microbiology

URL: http://dx.doi.org/10.1099/ijs.0.000345

DOI: 10.1099/ijs.0.000345


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