Eisenibacter elegans

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Eisenibacter elegans
Systematics
Department : Bacteroidetes
Class : Cytophagia
Order : Cytophagales
Family : Microscillaceae
Genre : Eisenibacter
Type : Eisenibacter elegans
Scientific name
Eisenibacter elegans
( Reichenbach 1989) Hahnke et al. 2017

Eisenibacter elegans is a kind of bacteria that belongs to the division of Bacteroidetes and is the type species of the genus.

Appearance

Eisenibacter elegans forms long cell threads with a width of 0.4-0.5 µm and a length of 50 µm. Often the filaments are even longer, more rarely shorter, in the range from 10 to 20 µm. The ends of the filaments are rounded. Eisenibacter elegans is motile and very active by sliding. There are no flagella . Spores are not formed. The gram test is negative. The colonies are colored orange by carotenoids . The main carotenoid is saproxanthin . The catalase test is negative, the oxidase test positive.

Growth and metabolism

Eisenibacter elegans is strictly aerobic and chemo-organotrophic . Metabolism is breathing . Although found in fresh water, it tolerates salinity and also grows on media with sea water. The optimal temperature for growth is 30 ° C, the pH value is 7.

Systematics

Eisenibacter elegans is one of the family of Microscillaceae , in turn, to the class Cytophagia is provided and is the type species and the only kind of Eisenibacter . The basonym of the species, Flexibacter elegans , was originally placed in the family of the Cytophagaceae , which is also in the order of the Cytophagales . On the basis of further genetic studies of the species in the Bacteroidetes department , the original systematic allocation of many species to the Flexibacter genus was no longer tenable and the majority of the species were assigned to other genera.

Individual evidence

  1. ↑ JP Euzéby: List of Prokaryotic Names with Standing in Nomenclature - Eisenibacter (as of June 4, 2019)
  2. ^ Richard L. Hahnke et al .: Genome-Based Taxonomic Classification of Bacteroidetes In: Frontiers in Microbiology . December 20, 2016 Link

literature

  • Jiri Hausler: Freshwater Flora of Central Europe, Vol. 20: Schizomycetes . Springer, 1982, ISBN 978-3-8274-2141-8 , pp. 152 .
  • 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 .