Influence of metabolic inhibitors on light sensitized contractions by erythrosin in mussels Anodonta cygnea L.

Lábos, Elemér (1965) Influence of metabolic inhibitors on light sensitized contractions by erythrosin in mussels Anodonta cygnea L. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 32. pp. 29-36. ISSN 0365-3005

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Abstract

Light sensitized rhythmic and tonic contractions by erythrosin B in glochidia of freshwater clam (Anodonta cygnea L.) was investigated in the presence of various metabolic inhibitors (10⁻⁴-10⁻³ M). On basis of examinations it is established that the process is not sensitive to monoiodo acetic acid, NaF, 2,4-DNP. It is considerably more sensitive to thiosemicarbazide, NH₄OH and NaN₃. It is most sensitive to cyanide. The findings show that the reaction is independent of glycolysis. Oxidative phosphorylation cannot play an important role either, whereas various oxidases are involved in the reaction. It may be concluded primarily on basis of the susceptibility to cyanide that light reaction is related to terminal oxidation and in particular to cytochromeoxidation. It is assumable that the photoreduced dye joins the process of terminal oxidation by means of monovalent electron-transfer.

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