Spirosoma xylofaga sp. nov., an oligotrophic pleomorphic bacterium from a myco-bacterial community of freshwater ecosystems
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- 作者：M. V. Zaichikova (1)
Yu. Yu. Berestovskaya (1)
B. B. Kuznetsov (2)
L. V. Vasil’eva (1) - 关键词：xylotrophic community ; oligotrophic bacteria ; dissipotrophs ; dystrophic waters ; acid tolerance ; Spirosoma xylofaga sp. nov.
- 刊名：Microbiology
- 出版年：2013
- 出版时间：July 2013
- 年：2013
- 卷：82
- 期：4
- 页码：459-465
- 全文大小：1201KB
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Yu. Yu. Berestovskaya (1)
B. B. Kuznetsov (2)
L. V. Vasil’eva (1)
1. Winogradsky Institute of Microbiology, Russian Academy of Sciences, pr. 60-letiya Oktyabrya 7, k. 2, Moscow, 117312, Russia
2. Bioengineering Center, Russian Academy of Sciences, pr. 60-letiya Oktyabrya 7, k. 2, Moscow, 117312, Russia
文摘
A novel aerobic bacterial strain Z-0088 was assigned to the genus Spirosoma on the basis of 16S rRNA analysis; it was isolated from a bacterial community of moderately acidic (pH 5.0) dystrophic, slightly humified water formed by xylotrophic fungi grown on decaying spruce wood. The cells are nonmotile, gramnegative, straight or curved rods, 0.5-.5 × 1.0-.0 μm; they may also be toroidal. The cells are usually single but can form spiral filaments containing from 4 to 13 coils; their reproduction is by division. Strain Z-0088 is an organoheterotroph utilizing xylan, inulin, xylose, sucrose, and N-acetylglucosamine as organic growth substrates. The bacterium is oligotrophic (the optimum substrate concentration is 0.5 g/L). It is characterized by high sensitivity to NaCl concentration; growth was completely suppressed at 1% NaCl. The strain grows in a pH range of 3.8-.5 with the optimum at pH 5.5-.5. The temperature range for growth was 13-5°C with the optimum at 28°C. The DNA G+C base content was 50.2 mol %. The ecophysiological features of strain Z-0088, such as oligotrophic, mesophilic, moderate acidophilic properties, and sensitivity to NaCl, support its designation as a representative of ombrophilic dissipotrophs. The strain is assigned to a novel species Spirosoma xylofaga sp. nov.