Articolo in rivista, 1995, ENG, 10.1016/1011-1344(94)07070-5
Antonella Sgarbossa and Sabina Lucia and Francesco Lenci and Domenico Gioffré and Francesco Ghetti and Giovanni Checcucci
Istituto di Biofisica del CNR, Via San Lorenzo 26, Pisa, Italy Dipartimento di Scienze dell'Ambiente e del Territorio dell'Università, Via A. Volta 4, Pisa, Italy
the effects of artificial UV-B irradiation on motility, viability, photomotile responses and photoreceptor spectroscopic properties of the red ciliate Blepharisma japonicum were investigated. Both the mean velocity of the cells and the percentage of motile cells exhibiting step-up photophobic responses significantly decreased, increasing UV-B irradiation time. No marked difference with dark-kept control samples was observed in cells irradiated with visible light. Absorption and fluorescence measurements on cell suspensions indicated that no UV-B induced bleaching or spectroscopically detectable damage of the photoreceptor chromophore took place. The experimental results suggest that the UV-B target is a component of the photosensory transduction chain different from the photopigment itself and that cell vitality is damaged by a direct effect of UV-B, without any significant contribution from a pigment-sensitized photodynamic reaction.
Journal of photochemistry and photobiology. B, Biology (Print) 27 (3), pp. 243–249
Blepharisma japonicum, Motility, Photomovement, Photoreceptor, Sensory transduction, UV-B
Gioffre Domenico, Checcucci Giovanni, Sgarbossa Antonella, Lucia Sabina, Lenci Francesco, Ghetti Francesco
ID: 266781
Year: 1995
Type: Articolo in rivista
Creation: 2013-10-27 12:47:16.000
Last update: 2022-11-17 15:51:37.000
CNR institutes
External links
OAI-PMH: Dublin Core
OAI-PMH: Mods
OAI-PMH: RDF
DOI: 10.1016/1011-1344(94)07070-5
URL: http://www.sciencedirect.com/science/article/pii/1011134494070705
External IDs
CNR OAI-PMH: oai:it.cnr:prodotti:266781
DOI: 10.1016/1011-1344(94)07070-5
ISI Web of Science (WOS): A1995QV01800007