Chlorobi

Definition

Chlorobi is a phylum of Gram-negative bacteria known for their unique green sulfur photosynthetic capabilities. They thrive in anaerobic environments and utilize light energy for growth.

5 Must Know Facts For Your Next Test

1. Chlorobi are obligate anaerobes, meaning they cannot survive in the presence of oxygen.
2. These bacteria perform anoxygenic photosynthesis using bacteriochlorophylls c, d, or e.
3. Electron donors for Chlorobi include hydrogen sulfide (H2S), elemental sulfur (S0), and thiosulfate (S2O3^2-).
4. They contribute to the sulfur cycle by oxidizing sulfide to sulfate.
5. Chlorobi form symbiotic relationships with various other microorganisms, often forming consortia with heterotrophic bacteria.

Related terms

Anoxygenic Photosynthesis: A form of photosynthesis that does not produce oxygen as a byproduct.

Bacteriochlorophylls:

Photosynthetic pigments found in various phototrophic bacteria.

Consortium: A symbiotic association between two or more different microorganisms.