🦠microbiology review

Green nonsulfur bacteria

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

Green nonsulfur bacteria are a group of phototrophic bacteria that utilize light as their energy source. They are known for their unique photosynthetic pigments and capability to perform anoxygenic photosynthesis.

5 Must Know Facts For Your Next Test

  1. Green nonsulfur bacteria perform anoxygenic photosynthesis, meaning they do not produce oxygen as a byproduct.
  2. They contain bacteriochlorophylls c, d, or e which are distinct from the chlorophyll found in plants.
  3. These bacteria can also grow chemoorganotrophically, meaning they can obtain energy by oxidizing organic compounds in the absence of light.
  4. Chloroflexus is a well-known genus of green nonsulfur bacteria often found in hot springs and other thermophilic environments.
  5. Green nonsulfur bacteria have flexible metabolic pathways allowing them to survive in diverse environmental conditions.
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