Chlorobiota

Jak číst taxoboxChlorobiota
alternativní popis obrázku chybí
Vědecká klasifikace
Doménabakterie (Bacteria)
KmenChlorobiota
TřídaChlorobia
ŘádChlorobiales
ČeleďChlorobiaceae
Rody
Některá data mohou pocházet z datové položky.

Chlorobiota[1][2] dříve Chlorobi (též zelené sirné bakterie) jsou kmen obligátně anaerobních fotoautotrofních bakterií, k němuž se však zařazuje pouze jedna čeleď s několika rody. Chlorobiota jsou příbuzné kmenu Bacteroidota[3]. Jsou to nejčastěji nepohyblivé druhy[3] a mohou se vyskytovat jako koky, tyčinky i spirály.

Modelovou bakterií v této skupině je Chlorobium tepidum.

Fotosyntéza

Tyto bakterie jsou schopné fotosyntézy, a to zejména díky barvivu bakteriochlorofylu. Mnohá barviva také bývají v speciálních tělískách, chlorozomech. Donorem elektronů pro fotosyntézu jsou sulfidové ionty, vodík či oxid železnatý. Pokud je jím síra, často se po redukci ukládá mimo buňku, kde může být v budoucnu oxidována.

Výskyt

Chlorobiota byly nalezeny například poblíž černých kuřáků v oceánu u Mexika, v hloubce 2500 metrů. V této hloubce žije bakterie "GSB1", a ačkoliv by se zdálo, že v takové hloubce není dostatek světla k fotosyntéze, vystačí si tato bakterie s tlumeným zářením z rozžhavených hornin[4][5]

Reference

V tomto článku byl použit překlad textu z článku Chlorobi na anglické Wikipedii.

  1. ↑ OREN, Aharon; GARRITY, George M. Valid publication of the names of forty-two phyla of prokaryotes. International Journal of Systematic and Evolutionary Microbiology [online]. 2021-10-20 [cit. 2024-03-25]. Roč. 71, čís. 10. DOI 10.1099/ijsem.0.005056. PMID 34694987. (anglicky) 
  2. ↑ LPSN. Domain Bacteria. Dostupné online (anglicky)
  3. ↑ a b D.A. Bryant & N.-U. Frigaard. Prokaryotic photosynthesis and phototrophy illuminated. Trends Microbiol.. Nov 2006, roč. 14, čís. 11, s. 488. DOI 10.1016/j.tim.2006.09.001. 
  4. ↑ http://www.osel.cz/index.php?clanek=2988
  5. ↑ Beatty JT, Overmann J, Lince MT, Manske AK, Lang AS, Blankenship RE, Van Dover CL, Martinson TA, Plumley FG. An obligately photosynthetic bacterial anaerobe from a deep-sea hydrothermal vent. Proc. Natl Acad. Sci. USA. 2005, roč. 102, čís. 26, s. 9306–10. 

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