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User:Boazt89/Chlorobium aggregatum

From Wikipedia, the free encyclopedia

Chlorobium chlorochromatii, originally known as Chlorobium aggregatum, is a symbiotic green sulfur bacteria that performs anoxygenic photosythesis; it is an obligate photoautotroph, using reduced sulfur species as electron donors. Chlorobium chlorochromatii can be found in stratified freshwater lakes. [1]

Chlorobium chlorochromatii
Scientific classification
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C. chlorochromatii
Binomial name
Chlorobium chlorochromatii previously C. aggregatum
Source



Topic Morphology

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C. chlorochromatii is a Gram-negative, non-motile bacillus, that exists in short chains. It is green in color and has a ring of chlorosomes around the inside of its cell wall. Chlorosomes contain the light harvesting pigment bacteriochlorophyll c. [2]

Ecology

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Photosynthetic green sulfur bacteria such as Chlorobium chlorochromatii reside in freshwater, stratified lakes beneath the micro-aerophilic algal layer in anaerobic, light-exposed environments. They have been found worldwide, mostly in holomictic or meromictic stratified lakes. Lakes that support this environment have been found in Germany, Tasmania, the USA, ice-covered lakes in Antarctica, Israel and Japan.[1] Chlorobium chlorochromatii prefer environments with low temperature and low sulfur concentrations.

Symbiosis

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Metabolism

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C. chlorochromatii conducts anoxygenic photosynthesis for it's electron source and uses reduced forms of sulfur, like SH2 as it's electron donor. It grows under strict anaerobic environments as a photolithoautotroph. (Wiley 2004)

References

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  1. ^ a b Chapin, B., Denoyelles, F., Gaham, D.W., Smith, V.H. "A deep maximum of green sulphur bacteria ('Chlorochromatium aggregatum') in a strongly stratified reservoir." Freshwater Biology (2004) 49, 1337-1354.
  2. ^ Kajetan, Vogl; Glaeser, Jens; Pfanes, Kristina R.; Wanner, Gerhard; overmann, Jörg (2006). ""Chlorobium chlorochromatii sp. nov., a symbiotic green sulfur baterium isolated from the phototrophic consortium "Chlorobium aggregatum". Archives of Microbiology. 185 (5): 363–372. doi:10.1007/s00203-006-0102-z. PMID 16555074.
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  1. ^ Chapin, B. R. K. (2004). "Freshwater Biology". A Deep Maximum of Green Sulphur Bacteria ('Chlorochromatium Aggregatum') in a Strongly Stratified Reservoir. doi:10.1111/j.1365-2427.2004.01270.x. Retrieved 20 October 2013. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)