Rhodothermaceae
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The Rhodothermaceae are a family of bacteria. They belong to the order Rhodothermales in the Phylum Rhodotermaeota . The name is derived from the Greek word rhodon for rose and the Greek word thermos for hot. The type genus is Rhodothermus Alfredsson et al. 1995
Appearance
The gram test is negative. The cells are straight rods . The size for Rhodothermus marinus is 0.5 × 2.0–2.5 µm , for Rhodothermus profundi between 0.5 and 1.5–3.5 µm. You are always immobile . Spores are not formed. The colonies are colored red. The pigment in Rhodothermus marinus is a carotenoid and the main quinone is menaquinone 7 . The bacteria are thermophilic (heat-loving). B. the growth temperature of Rhodothermus marinus in the range of 54-77 ° C, the temperature for optimal growth of Rhodothermus profundi at 70-75 ° C. For Salinobacter it is in the range from 35 to 40 ° C.
metabolism
The growth is aerobic or facultatively anaerobic ( Longibacter salinarum ). All species are chemo-organotrophic . Metabolism is breathing . Rhodothermus marinus forms heat-stable hydrolytic enzymes . Examples are enzymes for starch, hemicellulose and cellulose breakdown.
Occurrence
Types of Rhodothermus occur in extreme, hot areas, such as. B. in marine thermal springs . The halophilic species Longimonas halophila was found in a salt lake.
Systematics
The family consists of the following genera (as of January 16, 2019):
- Longibacter Xia et al. 2016
- Longimonas Xia et al. 2015
- Rhodothermus Alfredsson et al. 1995
Due to further investigations, the family was placed in a new phylum , the Rhodothermaeota, in 2016 . Some genera were then added to other, likewise newly established families, for example the genera Salisaeta and Salinibacter now belong to the Salinibacteraceae . Salinibacter is extremely halophilic ("salt-loving"). This species is one of the most extreme halophilic bacteria ever. The species Salinibacter ruber occurs in salt extraction plants . The genera Rubricoccus and Rubrivirga , which were formerly also listed in the Rhodothermaceae, now belong to the newly created family Rubricoccaceae .
swell
Individual evidence
- ↑ Michael T. Madigan, John M. Martinko, Jack Parker: Rhodothermus marinus, gen. Nov., Sp. nov., a Thermophibic, Halophilic Bacterium from Submarine Hot Springs in Iceland . In: Journal of General Microbiology . tape 134 , No. 2. England 1988, pp. 299-306 . Link: [1] ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Viggo Thór Marteinsson, Snaedis H. Bjornsdottir, Nadège Bienvenu, Jacob K. Kristjansson and Jean-Louis Birrien: Rhodothermus profundi sp. nov., a thermophilic bacterium isolated from a deep-sea hydrothermal vent in the Pacific Ocean . In: International Journal of Systematic and Evolutionary Microbiology . tape 60 , No. 2, December 2010, p. 2729-2734 . Link: Archived copy ( Memento of the original dated December 24, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Jun Xia, Yan-Xia Zhou, Li-Hua Zhao, Guan-Jun Chen, Zong-Jun Du: Longimonas halophila gen. Nov., Sp. nov., isolated from a marine solar saltern . In: International Journal of Systematic and Evolutionary Microbiology , Volume 66, pp. 3287-3292
- ^ Jean Euzéby, Aidan C. Parte: Family Rhodothermaceae. In: List of Prokaryotic names with Standing in Nomenclature ( LPSN ). Retrieved January 16, 2019 .
- ^ A b Raul Munoz, Ramon Rosselló-Móra, Rudolf Amann: Revised phylogeny of Bacteroidetes and proposal of sixteen new taxa and two new combinations including Rhodothermaeota phyl. nov. In: Systematic and Applied Microbiology Volume 39, Issue 5, Julie 2016, pp. 281-296
literature
- 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. 457-467 .
- Michael T. Madigan, John M. Martinko, Jack Parker: Brock - Microbiology . 11th edition. Pearson Studium, Munich 2009, ISBN 978-3-8273-7358-8 , pp. 456 .