ATP/ADP antiporter is involved in uncoupling of plant mitochondria induced by low concentrations of palmitate.
Carboxyatractyloside partially restored the transmembrane electrical potential difference (delta psi) dissipated by low concentrations of palmitate in pea stem mitochondria. This effect was more marked when mitochondria from sunflower were assayed. It is suggested that the ATP/ADP translocator is involved in the free fatty acid-induced uncoupling of oxidative phosphorylation in plant mitochondria, only when its level is sufficiently high and the concentration of the fatty acid is low to collapse only partially delta psi.
Vianello
A
A
Cattedre di Fisiologia Vegetale e Biochimica Vegetale, Università di Udine, Italy.
Petrussa
E
E
Macrì
F
F
D001278:Atractyloside / Q000031:analogs & derivatives / Q000494:pharmacology; D007887:Fabaceae; D006368:Helianthus; D008564:Membrane Potentials / Q000187:drug effects; D008928:Mitochondria / Q000378:metabolism*; D000226:Mitochondrial ADP, ATP Translocases / Q000378:metabolism*; D009243:NAD / Q000494:pharmacology; D010101:Oxygen Consumption / Q000187:drug effects; D019308:Palmitic Acid; D010169:Palmitic Acids / Q000494:pharmacology*; D010944:Plants / Q000378:metabolism / Q000648:ultrastructure*; D010946:Plants, Medicinal; D014475:Uncoupling Agents / Q000494:pharmacology*
D010169:Palmitic Acids; D014475:Uncoupling Agents; D009243:NAD; D001278:Atractyloside; D019308:Palmitic Acid; D000226:Mitochondrial ADP, ATP Translocases; C003853:carboxyatractyloside