1887

Abstract

A Gram-negative, aerobic, heterotrophic, non-pigmented, dimorphic prosthecate bacterium was isolated from tundra wetland soil and designated strain Z-0023. Cells of this strain had a dimorphic life cycle and developed a non-adhesive stalk at a site not coincident with the centre of the cell pole, a characteristic typical of representatives of the genus . A highly distinctive feature of cells of strain Z-0023 was the presence of a conical, bell-shaped sheath when grown at low temperature. This prosthecate bacterium was a psychrotolerant, moderately acidophilic organism capable of growth between 4 and 28 °C (optimum 15–20 °C) and between pH 4.5 and 8.0 (optimum 5.6–6.0). The major phospholipid fatty acid was 18 : 17 and the major phospholipids were phosphatidylglycerols. The G+C content of the DNA was 60.4 mol%. On the basis of 16S rRNA gene sequence similarity, strain Z-0023 was most closely related to (98 % similarity), (98 %) and (95 %). However, low levels of DNA–DNA relatedness to these organisms and a number of distinctive features of the tundra wetland isolate indicated that it represented a novel species of the genus , for which the name sp. nov. is proposed. The type strain is Z-0023 (=DSM 16100=ATCC BAA-896).

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2006-09-01
2019-09-22
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vol. , part 9, pp. 2083-2088

Data for utilization of carbon compounds, glycolipid and phospolipid fatty acid content, and polar lipid content of species. [PDF](51 KB)



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