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  • Title: Sensory perception and transduction of UV-B radiation by the ciliate Blepharisma japonicum.
    Author: Lenci F, Checcucci G, Ghetti F, Gioffrè D, Sgarbossa A.
    Journal: Biochim Biophys Acta; 1997 Jul 19; 1336(1):23-7. PubMed ID: 9271246.
    Abstract:
    A key question to answer studying the biological effects of ultraviolet radiation on planktonic micro-organisms is whether they can perceive UV-B radiation as a sensory signal, likewise they do with visible light. We have faced this problem performing an individual-cell analysis of Blepharisma japonicum photomotile responses to UV-B stimuli. Our results on spectral responsiveness and on the effects of a photoresponse inhibitor indicate that B. japonicum is capable to perceive and transduce UV-B radiation as an environmental sensory stimulus, which it escapes from gathering in shadowed areas. Similar UV-B avoidance motile reactions could serve as a behavioural defence mechanism contributing to avoid harmful overexposure to UV-B.
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