title: Studies on the reaction to light of Chilodonella steini (Blochmann, 1895) Cyrtophorida.
abstract: The effect of polychromatic and monochromatic light on the behaviour of Chilodenella steini cells is described. Negative phototaxis is observed when the cells are subjected to red light (640-660 nm), but positive phototaxis reaction when subjected to yellow light (570-590 nm). The occurrence of two different reactions points to the existence of two kinds of photoreceptor substances.
mesh_terms: D000818:Animals; D016798:Ciliophora / Q000502:physiology / Q000528:radiation effects*; D008027:Light; D009068:Movement / Q000528:radiation effects