Fermentation of 2-methoxyethanol by Acetobacterium malicum sp. nov. and Pelobacter venetianus |
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Authors: | Kazuhiro Tanaka Norbert Pfennig |
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Institution: | (1) Fakultät für Biologie, Universität Konstanz, Postfach 5560, D-7750 Konstanz, Federal Republic of Germany;(2) Present address: Fermentation Research Institute, 305 Tsukuba, Ibaraki, Japan |
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Abstract: | Anaerobic bacteria degrading 2-methoxyethanol were enriched from freshwater sediments, and three strains were isolated in pure culture. Two of them were Grampositive non-spore-forming rods and grew strictly anaerobically by acetogenic fermentation. Optimal growth occurred at 30°C, initial pH 7.5–8.0. 2-Methoxyethanol and 2-ethoxyethanol were fermented to acetate and corresponding alcohols. Hydrogen plus carbon dioxide, formate, acetoin, l-malate, lactate, pyruvate, fructose, and methoxyl groups of 3,4,5-trimethoxybenzoate and 3,4,5-trimethoxycinnamate were fermented to acetate. 1,2-Propanediol was fermented to acetate, propionate, and propanol. Strain MuME1 was described as a new species, Actetobacterium malicum. It had a DNA base composition of 44.1 mol% guanine plus cytosine. The third strain, which was identified as Pelobacter venetianus, fermented 2-methoxyethanol to methanol, ethanol, and acetate. |
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Keywords: | 2-Methoxyethanol 2-Ethoxyethanol l-Malate" target="_blank">l-Malate Hydrogen Acetobacterium malicum Felobacter venetianus Acetogenic Anaerobic Fermentation Degradation |
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