1887

Abstract

An aerobic, pink-pigmented, budding bacterium, designated strain S26, was isolated from an acidic peat bog of north-western Russia. Cells were non-motile and spherical, occurring singly, in pairs or in short chains, and were able to attach to surfaces by means of a holdfast material. Strain S26 was a moderately acidophilic, mesophilic organism capable of growth at pH 3.2–7.1 (optimum at pH 4.8–5.0) and at 4–33 °C (optimum at 20–26 °C). Most sugars, several organic acids and polyalcohols were the preferred growth substrates. The major fatty acids were C, Cω9 and Cω6,12. The major neutral lipids were n-C hydrocarbon and squalene; the polar lipids were phosphatidylglycerol, phosphatidylcholine and components with an unknown structure. The DNA G+C content of strain S26 was 62.2 mol%. 16S rRNA gene sequence analysis showed that strain S26 is a member of the order . Among taxonomically characterized representatives of this order, highest levels of 16S rRNA gene sequence similarity (95.1–95.2 %) were observed with strains of the non-filamentous, peat-inhabiting planctomycete . Strain S26 could be differentiated from based on pigmentation, significant differences in substrate utilization patterns, greater tolerance of acidic conditions and the presence of Cω9. Based on the data presented, strain S26 is considered to represent a novel species of the genus , for which the name sp. nov. is proposed; the type strain is S26 ( = DSM 23044 = VKM B-2599).

Funding
This study was supported by the:
  • Molecular and Cell Biology’ of Russian Academy of Sciences
  • Rosnauka project (Award 02.740.11.0023)
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2012-01-01
2024-12-07
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