Cyanobacteria, also called blue-green algae. Anoxygenic Photosynthesis Non-heterocystous nitrogen-fixing cyanobacteria are facultative. Cyanobacteria / s aɪ ˌ æ n oʊ b æ k ˈ t ɪər i ə /, also known as Cyanophyta, is a phylum of bacteria that obtain their energy through photosynthesis. [4] Organisms can obtain food by manufacturing food (photosynthesis), eating these photosynthetic organisms or by eating non-photosynthetic organi. Cyanobacteria: Life History and Ecology. Cyanobacteria get their name from the bluish pigment phycocyanin, which they use to capture light for photosynthesis. Photosynthetic bacteria are a group of bacteria that contain light absorbing pigments. Cyanobacteria, purple, green sulphur, green gliding bacteria and heliobacteria Photosynthesis and Respiration in Cyanobacteria. Wim FJ Vermaas, Arizona State University, Tempe, Arizona, USA Published online: April 2001. DOI: 10.1038/npg.els.0001670 Cyanobacteria are relatives of the bacteria, not eukaryotes, and it is only the chloroplast in eukaryotic algae to which the cyanobacteria are related. Photosynthesis and Respiration in Cyanobacteria Wim FJ Vermaas,Arizona State University, Tempe, Arizona, USA Cyanobacteria are among the very few groups that can. Cyanobacteria, also known as blue-green bacteria, blue-green algae, and Cyanophyta, is a phylum of bacteria that obtain their energy through photosynthesis. Photosynthesis is a process used by plants and other organisms to convert light energy. In plants, algae and cyanobacteria, photosynthesis releases oxygen.