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''Pseudomonas fluorescens'' is a common Gram-negative, rod-shaped bacterium.〔Palleroni, N.J. (1984) Pseudomonadaceae. Bergey's Manual of Systematic Bacteriology. Krieg, N. R. and Holt J. G. (editors) Baltimore: The Williams and Wilkins Co., pg. 141 - 199〕 It belongs to the ''Pseudomonas'' genus; 16S rRNA analysis has placed ''P. fluorescens'' in the ''P. fluorescens'' group within the genus, to which it lends its name. ==General characteristics== ''P. fluorescens'' has multiple flagella. It has an extremely versatile metabolism, and can be found in the soil and in water. It is an obligate aerobe, but certain strains are capable of using nitrate instead of oxygen as a final electron acceptor during cellular respiration. Optimal temperatures for growth of ''Pseudomonas fluorescens'' are 25-30 degrees Celsius. It tests positive for the oxidase test. Pseudomonas fluorescens is also a nonsaccharolytic bacteria. Heat-stable lipases and proteases are produced by ''Pseudomonas fluorescens'' and other similar pseudomonads.〔Frank, J.F. 1997. Milk and dairy products. In Food Microbiology, Fundamentals and Frontiers, ed. M.P. Doyle, L.R. Beuchat, T.J. Montville, ASM Press, Washington, p. 101.〕 These enzymes cause milk to spoil, by causing bitterness, casein breakdown, and ropiness due to production of slime and coagulation of proteins.〔Jay, J.M. 2000. Taxonomy, role, and significance of microorganisms in food. In Modern Food Microbiology, Aspen Publishers, Gaithersburg MD, p. 13.〕〔Ray, B. 1996. Spoilage of Specific food groups. In Fundamental Food Microbiology, CRC Press, Boca Raton FL, p. 220. I〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pseudomonas fluorescens」の詳細全文を読む スポンサード リンク
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