Rhodospirillum

Definition

Rhodospirillum is a genus of Gram-negative, spiral-shaped bacteria known for its phototrophic capabilities. These bacteria utilize light for energy through photosynthesis, often found in aquatic environments.

5 Must Know Facts For Your Next Test

1. Rhodospirillum species are part of the purple non-sulfur bacteria group and can perform anoxygenic photosynthesis.
2. They contain bacteriochlorophylls and carotenoids that allow them to capture light energy efficiently.
3. Unlike cyanobacteria, Rhodospirillum does not produce oxygen as a byproduct of photosynthesis.
4. They can switch between photoheterotrophic and chemoheterotrophic modes depending on the availability of light and organic compounds.
5. Rhodospirillum rubrum is one of the most studied species within this genus due to its metabolic versatility.

Related terms

Anoxygenic Photosynthesis: A form of photosynthesis where oxygen is not produced as a byproduct.

Purple Non-Sulfur Bacteria: A group of phototrophic bacteria that include Rhodospirillum, utilizing light without producing sulfur.

Bacteriochlorophylls:

Pigments found in certain phototrophic bacteria like Rhodospirillum, used to capture light energy for photosynthesis.