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PHOTOTACTIC ORIENTATION BY THE CILIATE, STENTOR COERULEUS
Author(s) -
Song PillSoon,
Häder DonatP.,
Poff Kenneth L.
Publication year - 1980
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1980.tb04055.x
Subject(s) - phototaxis , ciliate , biophysics , biology , action spectrum , botany , ecology
— Stentor coeruleus exhibits negative phototaxis to visible light, in addition to a step‐up photophobic response. The negative phototaxis was established by demonstrating the swimming of Stentor toward a focused beam away from the light source. The action spectrum showed a maximum at 610–620 nm and is essentially identical to that of the step‐up photophobic response. Proton uncouplers such as micromolar concentrations of FCCP and TPMP + inhibited the negative phototaxis.