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Paenibacillus tylopili
''Paenibacillus tylopili'' is a soil-dwelling, Gram-positive, rod-shaped bacterium. Described as new to science in 2008, it was found in the mycorhizosphere of the bolete fungus ''Tylopilus felleus''.〔
==Description==
The Gram-positive cells are rod-shaped, with dimensions of 3.0–5.9 μm long by 1.2–1.6 μm wide. Swollen sporangia produce oval endospores. It has an optimal growth temperature of , with a minimum of . Its optimum growth pH is 8.0, but can grow in the range 6.0–9.0. It is a facultative anaerobe. When cultured for two days at on agar plates containing trypticase soy agar growth medium, the resulting colonies are whitish and somewhat translucent and glossy, round and slightly raised off the surface, measuring 1–2 mm in diameter.〔
In standard tests of physiological characteristics, the bacterium was able to hydrolyse starch, but not casein nor gelatin, and it was able to produce acid from both of the sugars lactose and raffinose. It does not have the ability to reduce nitrate.〔
Molecular analysis of 16S ribosomal RNA gene sequences shows the species to be closely related to ''Paenibacillus amylolyticus'', ''P. pabuli'' and ''P. xylanilyticus''.〔 In 2011, a novel strain of ''Paenibacillus'', named P118, isolated from the gut of the tropical fish ''Parotocinclus maculicauda'', was reported to be closely related to ''P. tylopili'' based on 16S rRNA gene sequence similarity.〔 Like all members of the genus ''Paenibacillus'', its predominant fatty acid is ''anteiso''-C15:0 (a straight chain of 15 carbon atoms, without any double bonds). Other abundant fatty acids are ''iso''-C16:0, ''iso''-C15:0 and ''n''-C16:0. The bacterium has a GC-content of 44.3%. Its cell wall contains the diamino acid ''meso''-2,6-diaminopimelic acid.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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