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The Classification Of Genus Bacillus

The Classification Of Genus Bacillus. Liu Guohong. Content. Characteristic of Bacillus Related Bacillus and Its summarization Fatty acid identification The phenotypic characteristic of ten Bacillus species. Characteristic of Bacillus.

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The Classification Of Genus Bacillus

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  1. The Classification Of Genus Bacillus Liu Guohong

  2. Content • Characteristic of Bacillus • Related Bacillus and Its summarization • Fatty acid identification • The phenotypic characteristic of ten Bacillus species

  3. Characteristic of Bacillus • Bacillus rod-shaped, Gram-positive or variable, spore-forming, aerobic or facultatively anaerobic. • The genus includes thermophilic and psychrophilic, acidophilic and alkalophilic, freshwater and halophilic bacteria that utilize a wide range of carbon sources for heterotrophic growth or grow autotrophically.

  4. Colony roough, untransparent, cream-white or brown, drape, producing pigment. • pH5.5-8.5. • G+C 41.5-47.5 mol%. • Type species is Bacillus.subtilis.

  5. Related Bacillus and Its summarization

  6. Thermobacillus Gram-negative, rod-shaped, aerobic,spore-forming, non-motile, Main fatty acid is iso-C16:0. The G+C is 57.5 mol%. Typespecies is Thermobacillus xylanilytus. Geobacillus Vegetative cell rod-shaped, single or in short chain, motile by means of peritrichous flagella or non-motile aerobic or facultatively anaerobic. 37-75 ℃, pH6.0-8.5. Main fatty acid is iso-C15:0, iso-C16:0 and iso-C17:0. The G+C is 48.2-58 mol%. Typespecies is Geobacillusstearothermophilus.

  7. Ureibacillus • Colony cirluar,flat, transparent,motile,Gram-negative, rod-shaped or in chain, aerobic, thermopfilic. • Main fatty acid is iso-C16:0. The G+C is 35.7-41.5 mol%. • Type species is Ureibacillusthermosphaericus.

  8. Thiobacillus • Growth condition range is large, pH0-8, 20-50℃. • Colony is small, Gram-negative, motile. G+C 50-68%.

  9. The second edition of《Bergey's Manual of Systematic Bacteriology》, eight species of Thiobacillus were reassigned to three new genera，namely Acidithiobacillus (including Thiobacillus thiooxidans, Thiobacillus ferrooxidans, Thiobacillus caldus and Thiobacillusalbertensis), Halothiobacillus (including Thiobacillus neapolitanus, Thiobacillus halophilus and Thiobacillus hydrothermalis) and Thermithiobacillus • (including Thiobacillus tepidarius).

  10. Halothiobacillus • Gram-negative,rod-shaped, Obligately acidophilic, using reduced sulfur compounds to support autotrophic growth. • optimum tempaerate is 30-40 ℃, pH6.5-8.0 . • The G+C is 56-68%. • Type species is Halothiobacillus neapolitanus (formerly Thiobacillusneapolitanus) • Thermithiobacillus • Obligately aerobic, moderately thermophilic and chemolithoautotrophic, Gram-negative, non-sporeforming • Grow on reduced inorganic sulfur compounds;, unable to oxidize ferrous • iron. • G+C 66-67%. • The type species is Thermithiobacillus tepidarius (formerly Thiobacillustepidarius). • Acidithiobacillus • Obligately chemolithoautotrophic Gram-negative, rods, obtaining energy from reduced inorganic sulfur compounds. • G+C 52-64 mol%， • The type species is Acidithiobacillus thiooxidans (formerly Thiobacillus thiooxidans).

  11. Gracilibacillus • Obligately aerobic. • Main fatty acid is anteiso15:0, The G+C is 38 -39 mol%. • The type species is Gracilibacillushalotolerans. • Salibacillus • The main fatty acid is iso15:0 and anteiso 15:0. • The type species is Salibacillus salexigens. • Brevibacillus • Rod-shaped,Gram-positive or variable，obligately aerobic. • Main fatty acid is iso-C15:0 and anteiso-C15:0, The G+C is 42.8-57.4 mol%. • The type species is Brevibacillus brevis.

  12. Aneurinibacillus • Main fatty acid is iso-C15:0, iso-C16:0and C16:0 , The G+C is 41.1-43.4 mol%. • The type species is Aneurinibacillus aneurinolyticus. • Lentibacillus • Main fatty acid is anteiso-C15:0 and iso-C16:0. The G+C is 44 mol%. • The type species is Lentibacillus salicampi. • Jeotgalibacillus • Main fatty acid is iso-C15:0. G+C 44 mol%. • The type species is Jeotgalibacillus alimentarius. • Marinibacillus • Main fatty acid is anteiso-C15:0. • The type species is Marinibacillus marinus.

  13. Methylobacillus • Main fatty acid is C16:0 and C16:1. • Paralactobacillus • G+C 46.1-46.2 mol% • The type species is Paralactobacillus selangorensis. • Panenibacillus • Main fatty acid is anteiso-C15:0. • Anoxybacillus • G+C 42 mol%. • The type species is Anoxybacillus pushchinensis. • Virgibacillus • Main fatty acid is iso-C15:0 and anteiso-C15:0.

  14. Fatty acid identification

  15. The phenotypic characteristic of ten Bacillus species

  16. Thanking for your attention

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