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The green sulfur bacteria are a phylum, Chlorobiota, [4] of obligately anaerobic photoautotrophic bacteria that metabolize sulfur. [ 5 ] Green sulfur bacteria are nonmotile (except Chloroherpeton thalassium , which may glide) and capable of anoxygenic photosynthesis .
Chlorobium is a genus of green sulfur bacteria. They are photolithotrophic oxidizers of sulfur and most notably utilise a noncyclic electron transport chain to reduce NAD+. Photosynthesis is achieved using a Type 1 Reaction Centre using bacteriochlorophyll (BChl) a.
Like all other green sulfur bacteria, P. aestuarii gets its energy through a process called anoxygenic photosynthesis.Their major pigment is bacteriochlorophyll c, giving the cultures a green appearance; however, as they age, cultures can become a dirty green/brown, or white with build-up of elemental sulfur. [1]
Chlorobium chlorochromatii, originally known as Chlorobium aggregatum, is a symbiotic green sulfur bacteria that performs anoxygenic photosynthesis and functions as an obligate photoautotroph using reduced sulfur species as electron donors. Chlorobium chlorochromatii can be found in stratified freshwater lakes. [2]
Under anaerobic conditions, sulfide can be oxidized to sulfur and then sulfate by Purple and Green sulfur bacteria. H 2 S → S 0 → SO 2− 4. Sulfur Oxidation. Sulfur can also be oxidized to sulfuric acid by chemolithotrophic bacteria, such as Thiobacillus and Acidithiobacillus. S 0 + 2O 2 → H 2 SO 4. Sulfur Reduction
A chlorosome is a photosynthetic antenna complex found in green sulfur bacteria (GSB) and many green non-sulfur bacteria (GNsB), together known as green bacteria. [2] They differ from other antenna complexes by their large size and lack of protein matrix supporting the photosynthetic pigments.
Purple bacteria, Heliobacteria, Green Sulfur Bacteria, Chloroflexota, Chloracidobacterium thermophilum [2] 805, 830–890 BChl b: Purple bacteria: 835–850, 1020–1040 BChl c: Green sulfur bacteria, Chloroflexota, C. thermophilum, [2] C. tepidum: 745–755 BChl d: Green sulfur bacteria: 705–740 BChl e: Green sulfur bacteria: 719–726 BChl f
the green sulfur bacteria require lower light intensities than the purple sulfur bacteria and they also absorb different light wavelengths; since they are physically covered by one or more layers of purple sulfur bacteria, the green sulfur bacteria are protected from oxygen, as they are obligate anaerobes; in return, the green sulfur bacteria ...