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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]
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Species: | C. chlorochromatii
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Chlorobium chlorochromatii previously C. aggregatum Source
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Topic Morphology
editC. 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
editPhotosynthetic 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
editMetabolism
editC. 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
edit- ^ 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.
- ^ 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.
External links
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- ^ 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.
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