Bacteria | Photosynthetic electron donor | O2 use |
|---|---|---|
Green sulfur | H2, H2S, S | Anoxygenic |
Green nonsulfur | Variety of amino acids and organic acids | Anoxygenic |
Purple sulfur | H2, H2S, S | Anoxygenic |
Purple nonsulfur | Usually organic molecules | Anoxygenic |
Cyanobacteria | H2O | Oxygenic |