M ethylobacter

• Main Authors: Collins, David A., Akberdin, Ilya R., Kalyuzhnaya, Marina G.
• Format: Other/Unknown Material
• Language: English
• Published: Wiley 2017
• Subjects: Arctic; Hayward; Saline Lake; Tundra
• Online Access: http://dx.doi.org/10.1002/9781118960608.gbm01179.pub2; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F9781118960608.gbm01179.pub2; https://onlinelibrary.wiley.com/doi/pdf/10.1002/9781118960608.gbm01179.pub2; https://onlinelibrary.wiley.com/doi/full-xml/10.1002/9781118960608.gbm01179.pub2

Me.hy.lo.bac'ter. N.L. neut. n. methylum the methyl radical; N.L. masc. n. bacter rod; N.L. masc. n. Methylobacter methyl rod. Proteobacteria / Gammaproteobacteria / Methylococcales / Methylococcaceae / Methylobacter Cells are rods, spherical, or elliptical , 0.8–1.5 × 1.2–3.0 µm. Occur singly, in pairs, and in chains. Gram‐negative . The cells are usually motile. Some strains might form a cyst‐like resting stage , which usually confers desiccation resistance . Obligate utilizers of methane for carbon and energy . Require oxygen for methane oxidation. Oxidase and catalase positive. Neutrophilic , optimum pH is observed between 6.5 and 7.5. Majority of species are mesophilic, with optimal growth between 23 and 35°C. Some representatives are psychrotolerant and psychrophilic. Two species require sodium ions for growth. Their fatty acid composition depends on growth conditions (salinity, pH, and temperature). In nonhalophilic strains and halophilic strains grown at low salinity, pH 6.8–7.2 and 30°C, the main fatty acid is C 16:1 ω7 c . Ubiquinone‐8 (Q‐8) is the predominant lipoquinone. The genome sizes vary slightly ranging between 4.7 and 5.3 Mb. Methylobacter strains are typical inhabitants of freshwater and saline lake sediments, river and wetland muds, activated sludge, arctic and tundra soils, wastewater, and oceanic water. DNA G + C content (mol%) : 49–52. Type species : Methylobacter luteus (Romanovskaya, Malashenko and Bogachenko 1981) Bowman, Sly, Nichols and Hayward 1993, 749 VP ( Methylococcus luteus Romanovskaya, Malashenko and Bogachenko 1981, 382; Effective publication: Romanovskaya, Malashenko and Bogachenko 1978, 124).