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EFFECTS OF IONOPHORES AND RUTHENIUM RED ON THE PHOTOTAXIS OF STENTOR COERULEUS AS MEASURED BY SIMPLE DEVICES
Author(s) -
Chang TaekHyoun,
Walker Edward B.,
Song PillSoon
Publication year - 1981
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.1751-1097.1981.tb05516.x
Subject(s) - phototaxis , valinomycin , ionophore , chemistry , biophysics , ruthenium red , ruthenium , membrane potential , calcium , biology , biochemistry , botany , catalysis , organic chemistry
— Two simple methods of phototaxis measurements have been applied to study the effects of ionophores on the negative phototactic response in Stentor coeruleus. The inhibitory effects of Ca 2+ ‐ionophore (A23187), Ca 2+ ‐blocking agent (Ruthenium Red), and K + ‐ionophore (valinomycin) on photo‐taxis have been determined. Results suggest that the influx of Ca 2+ plays a transducing role in the phototaxis of Stentor.