Flexibacter flexilis
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| Soriano 1945 |
Flexibacter flexilis is a type of bacteria that belongs to the division of Bacteroidetes . It is the type species of the genus Flexibacter . The generic name is derived from the Latin adjective “flexus” (wound) and the Greek word “baktron” (rod) and refers to the cell shape. The species name F. flexilis is derived from the Latin adjective "flexilis", which means something like flexible. The types of Flexibacter are important soil bacteria and probably make a significant contribution to the decomposition of plant residues.
Appearance
The cells of Flexibacter flexilis are rod-shaped, 0.5 µm wide and between 10 and 60 µm long, usually between 10 and 20 µm in length. There are no flagella . The cells are filamentous, they form long threads. The ends are pointed and occasionally curved. Flexibacter flexilis is motile by gliding, but not very active. Spores are not formed. The gram test is negative. The colonies are colored orange, but in many colonies they are only very dull. The main carotenoid is saproxanthin . The oxidase test is positive, the catalase test negative. The optimal temperature for growth is 25 ° C, the optimal pH value around 7.
Growth and metabolism
Flexibacter flexilis is strictly aerobic and chemo-organotrophic . Metabolism is breathing . Starch and gelatin are hydrolyzed , but unlike some other types of Flexibacter , chitin is not.
Systematics
Flexibacter flexilis belongs to the family of Cytophagaceae , which in turn belongs to the class Cytophagia . The species was created by Santos Soriano in 1945.
BV Gromov also described Flexibacter flexilis var. Algavorum in 1972 , which is characterized by the fact that it is able to lyse (dissolve) some types of blue-green algae . The algae species include Nostoc , Anabaena and Phormidium . Species of Nostoc are particularly susceptible; cells from cultures dissolve completely within three to four days.
Individual evidence
- ↑ Johannes CG Ottow : Microbiology of Soils: Biodiversity, Ecophysiology and Metagenomics , Springer Verlag, Heidelberg New York 2011, ISBN 3642008232 .
- ↑ Euzéby JP. List of Prokaryotic Names with Standing in Nomenclature - Flexibacter ( Memento of the original of March 3, 2012 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (As of May 29, 2013)
literature
- Jiri Hausler: Freshwater Flora of Central Europe, Vol. 20: Schizomycetes . Springer, 1982, ISBN 978-3-8274-2141-8 , pp. 146 .
- War, NR; Ludwig, W .; Whitman, WB; Hedlund, BP; Paster, BJ; Staley, JT; Ward, N .; Brown, D .; Parte, A .: Bergey's Manual of Systematic Bacteriology. Volume 4: The Bacteroidetes, Spirochaetes, Tenericutes (Mollicutes), Acidobacteria, Fibrobacteres, Fusobacteria, Dictyoglomi, Gemmatimonadetes, Lentisphaerae, Verrucomicrobia, Chlamydiae, and Planctomycetes . Springer, 2010, ISBN 978-0-387-68572-4 , pp. 392-397 .