Halobacteria
Also known as Haloarchaea
Haloarchaea (halophilic archaea, halophilic archaebacteria, halobacteria) are a class of archaea under the phylum Euryarchaeota, found in water saturated or nearly saturated with salt. 'Halobacteria' are now recognized as archaea rather than bacteria and are one of the largest groups of archaea. The name 'halobacteria' was assigned to this group of organisms before the existence of the domain Archaea was realized, and while valid according to taxonomic rules, should be updated. Halophilic archaea are generally referred to as haloarchaea to distinguish them from halophilic bacteria.
Species
ハロバクテリア綱
CLASS
- KingdomArchaea
- PhylumHalobacteriota
- ClassHalobacteria
Habitatmarine, brackish
高度好塩菌（こうどこうえんきん、ハロバクテリア）とは、ユリアーキオータ門ハロバクテリウム綱に属す古細菌の総称。いずれも増殖に高い塩化ナトリウム (NaCl) 濃度を要求する。高度好塩性古細菌、好塩性アーキアやハロアーキア (Haloarchaea) と呼ぶこともある。 しかしながら、近年属種の増加により、NaCl濃度が0.9 Mでも増殖可能な種の報告や、最適増殖NaCl濃度が2.0 M以下であるHaloferax volcanii、Halorubrum sodomense、Halorussus ruberなどが報告されている。 広義の高度好塩菌には、上記に加え、至適増殖NaCl濃度が2.5–5.2M（高度好塩性）の古細菌・真正細菌全てを含む。しかし、これらはいずれもメタン菌や光合成細菌（真正細菌）であり、系統関係上高度好塩菌には含まれず、発見種もわずかである。また近年、新たな系統群としてナノ好塩古細菌（Nanohaloarchaea）が報告された。詳細は好塩菌を参照。
via GBIF
Article
16 sectionsContents
- Taxonomy
- Phylogeny
- Molecular signatures
- Living environment
- Adaptations to environment
- Phototrophy
- Cellular shapes
- As exophiles
- Medical use
- Climate change
- See also
- References
- Further reading
- Journals
- Books
- External links
Haloarchaea (halophilic archaea, halophilic archaebacteria, halobacteria) are a class of archaea under the phylum Euryarchaeota, found in water saturated or nearly saturated with salt. 'Halobacteria' are now recognized as archaea rather than bacteria and are one of the largest groups of archaea. The name 'halobacteria' was assigned to this group of organisms before the existence of the domain Archaea was realized, and while valid according to taxonomic rules, should be updated. Halophilic archaea are generally referred to as haloarchaea to distinguish them from halophilic bacteria.
These halophilic microorganisms require high salt concentrations to grow, with most species requiring more than 2M NaCl for growth and survival.