Shewanella

• Main Author: Bowman, John P.
• Format: Other/Unknown Material
• Language: English
• Published: Wiley 2015
• Subjects: Sea ice
• Online Access: http://dx.doi.org/10.1002/9781118960608.gbm01100; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F9781118960608.gbm01100; https://onlinelibrary.wiley.com/doi/pdf/10.1002/9781118960608.gbm01100; https://onlinelibrary.wiley.com/doi/full-xml/10.1002/9781118960608.gbm01100

Shew.a.nel' l.a . M.L. dim. ending ‐ ella Shewanella named after James Shewan for his work in fisheries microbiology. Proteobacteria / Gammaproteobacteria / Alteromonadales / Alteromonadaceae / Shewanella Straight or curved rods , 0.5–0.8 × 0.7–2.0 µm. Endospores and microcysts are not formed. Motile by a single, unsheathed, polar flagellum . Gram negative. Colonies are often pale tan to pink‐orange, due to cytochrome accumulation. Oxidase and catalase positive . Chemoheterotrophic. Facultatively anaerobic. Oxygen is used as the electron acceptor during aerobic growth. Anaerobic growth is predominantly respiratory the oxidation of organic carbon compounds or H 2 is coupled to the reduction of various inorganic and organic electron acceptors, including NO 3 − , NO 2 − , Fe 3+ , trimethylamine‐ N ‐oxide, fumarate, various sulfur compounds, and Mn 4+ . May also be fermentative , producing acid (but usually no gas) from carbohydrates, such as d‐glucose and N ‐acetylglucosamine. Constitutive arginine dihydrolase is usually absent. Most strains can form H 2 S from thiosulfate. May require Na + ions for growth. Most species can grow at 4°C . Some species are psychrophilic. One species is psychrophilic and barophilic. Major fatty acids are C 13:0 iso , C 14:0 , C 15:0 , C 15:0 iso , C 16:1 ω7c , C 16:0 , and C 17:1 ω8c . Several species can also form significant quantities of the omega‐3 fatty acid eicosapentaenoic acid (C 20:5 ω3c ). Isoprenoid quinone components include ubiquinone‐8, ubiquinone‐7, and menaquinone‐7, with smaller amounts of methylmenaquinone‐7. Major polyamines are putrescine and cadaverine. Member of the order Alteromonadales , family Alteromonadaceae , class Gammaproteobacteria . Isolated from clinical samples, chilled meats, butter, cutting oils, fresh water, freshwater sediment, estuaries, salt marshes, marine algae, seawater, marine sediment, fish, marine invertebrates, sea ice, marine snow, and abyssal ocean waters. The mol % G + C of the DNA is : 38–54. Type species : Shewanella putrefaciens ...