Abstract
1. 1. Using the preparations of lateral stripe skin, the motile mechanism of the neon tetra ( Paracheirodon innesi) iridophores was studied. 2. 2. Colchicine and vinblastine, antimitotic reagents, inhibited the iridophore response to norepinephrine (NE) reversibly. 3. 3. Erythro-9-(3-(2-hydroxynonyl)] adenine, a dynein ATPase inhibitor, also blocked the response in a dose-dependent manner. 4. 4. The treatment with cytochalasin B, an actin inhibitor, also prevented the NE-induced response. 5. 5. From the results, it was suggested that the motive force for the change in the angle of inclination of the light-reflecting platelets within the iridophores may be generated by interactions between dynein and tubulin. Actin filaments may be indispensable to the motile process.
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