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Pseudomonas protegens : ウィキペディア英語版 | Pseudomonas protegens
''Pseudomonas protegens'' are widespread Gram-negative, plant-protecting bacteria. Some of the strains of this novel bacterial species (CHA0 and Pf-5, for example) previously belonged to ''P. fluorescens''. They were reclassified since they seem to cluster separately from other fluorescent ''Pseudomonas'' species. ''P. protegens'' is phylogenetically related to the ''Pseudomonas'' species complexes ''P. fluorescens'', ''P. chlororaphis'', and ''P. syringae''. The bacterial species characteristically produces the antimicrobial compounds pyoluteorin and 2,4-diacetylphloroglucinol (DAPG) which are active against various plant pathogens.〔 == General characteristics == Like ''P. fluorescens'', ''Pseudomonas protegens'' is a typical soil microorganism with an extremely versatile metabolism, and can be isolated from roots of various plant species. The microbe is strictly aerobe (no reduction of nitrate) and oxidase-positive.〔 The bacterium grows at temperatures between 4 °C and 36 °C, and has one to three flagella.〔Voisard, C. (1988) Etude génétique de ''Pseudomonas fluorescens'' CHA0, une souche antagoniste de champignons phytopathogènes. In: PhD Dissertation No. 8663, ETHZ, Zürich.〕
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