Index >> Bacterial Nutrition >> Cyanobacteria Blue Green Algae and Blue Green Bacteria

3. Electron source is water. Some species can use reduced S compounds (anoxygenic photosynthesis with only one  photosystem ).4. Respiration is aerobic when growing photosynthetically.5.Genera: Synochococus, Pseudanataena, Gloeobacter. 6. Growth can occur in the dark with the utilization of storage compounds. Some species grow heterotrophically in the dark in symbiosis with cycads. Some strins can fix N2 in the dark (unique feature).