Photomovement – the modulation of cell movement as a function of the incident light – is employed by the cyanoabacteria as a means to find optimal light conditions in their environment. There are three types of photomovement: photokinesis, phototaxis and photophobic responses.Checcucci, G., Sgarbossa, A. and Lenci, F. (2004) "Photomovements of microorganisms: An introduction". CRC Handbook of Organic Photochemistry and Photobiology, 2nd ed., CRC Press.
