Photosynthesis anoxygenic

Anoxygenic photosynthesis Type of photosynthesis in green and purple bacteria in which oxygen is not produced. 

Flowever, many photosynthetic bacteria, such as purple sulfur and green sulfur bacteria contain special bacteriochlorophyll compounds (not chlorophyll a) and carry out anoxygenic photosynthesis without producing oxygen ... 

Cohen Y, Jorgensen BB, Revsbech NP, et al. 1986. Adaptation to hydrogen sulfide of oxygenic and anoxygenic photosynthesis among cyanobacteria. Appl Environ Microbiol 51 398-407. 

Continuum of metabolic strategies. AnAnP, anaerobic anoxygenic photosynthesis OP, oxygenic photosynthesis AAnP, aerobic anoxygenic photosynthesis RP/PC, rhodopsin and other pigments HT, heterotroph DOM, dissolved organic matter. Source-. From Filer, A. (2006). Applied Environmental MIoroblology, 42(12), 7431-7437. 

This cyclic pathway was first proposed for Chlorobium sp. that use an anoxygenic photosynthesis for energy supply [3]. It reverses the reactions of the oxidative citric acid cycle (Krebs cycle) and forms acetyl-CoA from two C02 (Figure 3.2). 

Photons are able to cause such effects. Light sensitivity of cytochrome containing systems has been known for a long time. For example, when bacteria of the type Rhodomicrobium (red microbe) were exposed to near infrared (NIR) radiation, their cytochrome system was oxidized from the ferrous to the ferric state (30). It is important to note that an archaic type of anoxygenic photosynthesis based on the oxidation of Fe(II) species has in the mean time been discovered (31), and that Rhodomicrobium strains are now known to belong to such types of photoferrotrophic microorganisms (32). 

AUgaier, M., Uphoff, H., Felske, A., and Wagner-Dohler, I. (2003). Aerobic anoxygenic photosynthesis in Roseobacter clade bacteria from diverse marine habitats. Appl. Environ. Microbiol. 69, 5051— 5059. 

B.B. Buchanan. 1992. Carbon dioxide assimilation in oxygenic and anoxygenic photosynthesis P/zotoyywt/z. Res. 33 147-162. 

Once anoxygenic photosynthesis had evolved, the planet would have become widely habitable and the biosphere much more productive. Tidal and shallow-water environments around the globe would have been immediately occupied by hfe. Sulfureta would have cycled sulfur, derived from oceanic volcanogenic sulfate, between the upper more oxidized layers of mats and the lower H2S-rich layers, creating a complex microbial mat habitat. 

Cohen Y., Jorgensen B. B., Padan E., and Shilo M. (1975) Sulfide-dependent anoxygenic photosynthesis in cyanobacterium oscillatoria-limnetica. Nature 257(5526), 489-492. 

Padan E. (1979) Facultative anoxygenic photosynthesis in cyanobacteria. Ann. Rev. Plant Physiol. Plant Molecul. Biol. 30, 27-40. 

Grice K., Gibbison R., Atkinson J. E., Schwark L., Eckardt C. B., and Maxwell J. R. (1996a) Maleimides (1//-pyrrole-2, 5-diones) as molecular indicators of anoxygenic photosynthesis in ancient water columns. Geochim. Cosmochim. Acta... 

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