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Journal of Experimental Biology 143,347-357 (1989)
Published by Company of Biologists 1989

METABOLIC CONTROL OF LUMINESCENCE IN THE LUMINOUS ORGANS OF THE TELEOST PORICHTHYS: EFFECTS OF THE METABOLIC INHIBITORS IODOACETIC ACID AND POTASSIUM CYANIDE

J. F. REES 1 and F. BAGUET 1

1 Laboratoire de Physiologie animale et des animaux domestiques, Université Catholique de Louvain, Place de la Croix du Sud, 5, B-1348 Louvain-la-Neuve, Belgium

1. The treatment of isolated photophores of the epipelagic luminescent fish Porichthys notatus Girard with the glycolytic inhibitor iodoacetic acid (IAA) induces light production.

2. This luminescence is not significantly affected by the adrenergic antagonists phentolamine and propranolol.

3. The addition of pyruvate, phosphoenolpyruvate or glyceraldehyde 3-phosphate in saline suppresses the light response to IAA. D-Glucose, D-glyceraldehyde, and 2- and 3-phosphoglycerate have no inhibitory effects.

4. The luminescence of the photophores induced by KCN is inhibited by D-glucose, D-glyceraldehyde 3-phosphate and 3-phosphoglycerate. In contrast, 2-deoxy-D-glucose, pyruvate, phosphoenolpyruvate, D-glyceraldehyde and 2-phosphoglycerate do not affect this light production.

5. These results confirm the view that glycolysis and oxidative phosphorylation are essential metabolic pathways in the photogenic cells. They further indicate that common products of these tightly associated metabolic pathways may regulate the activity of the luminous system in these cells.

Key words: bioluminescence, glycolysis, iodoacetic acid, cyanide, fish, photophore

Accepted on January 10, 1989






© The Company of Biologists Ltd 1989