Electron micograph of Synechocystis aquatilis (Chroococcales),grown in liquid medium BG-11. The protoplasm is clear and the plasma membrane is surrounded by the cell wall..Thylakoids are arranged and granular glycogen distributed within the thylakoids .
figure in reference
N. H. Noaman, A. M. Khaleafa and M. I. Abdel Nabi (2004). Efficiency of Synechocystis aquatilis and Chroococcus schizodermaticus in wastewater treatment. Egypt. J. Microbiol., 9, 162-178.