Photosynthetic autotrophic type Cyanobacteria is the old name of cyanobacteria, and algae, including unicellular and multicellular, belong to photoautotrophic microorganisms. Different from photosynthetic bacteria, photosynthetic bacteria (Rhodosporus) carry out primitive photosynthetic phosphorylation, are anaerobic organisms in the reaction process, and do not release oxygen, while cyanobacteria can carry out photosynthesis and release oxygen.