EFFECTS OF IONOPHORES AND RUTHENIUM RED ON THE PHOTOTAXIS OF STENTOR COERULEUS AS MEASURED BY SIMPLE DEVICES |
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| Authors: | Taek-Hyoun Chang Edward B. Walker Pill-Soon Song |
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| Affiliation: | Department of Chemistry, Texas Tech University, Lubbock, TX 79409, USA |
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| Abstract: | Abstract— 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 Ca2+-ionophore (A23187), Ca2+-blocking agent (Ruthenium Red), and K+ -ionophore (valinomycin) on photo-taxis have been determined. Results suggest that the influx of Ca2+ plays a transducing role in the phototaxis of Stentor. |
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