Cercospora beticola toxins. determination of O 2− · scavenging activity of beticolin-1

Abstract

The O 2 − · scavenging properties of beticolin-1, a fungal toxin, have been studied using peroxidase-mediated luminol chemiluminescence. A comparison between beticolin-1, vitamin E and tiron is reported: beticolin-1 displays an anti-radical effect without inhibiting peroxidase activity in a larger range of concentrations (1 × 10 −8−1 × 10 −5 M) than vitamin E (3 × 10 −7−1 × 10 −5 M) or tiron (5 × 10 −7−4 × 10 −5 M). Maximal scavenging efficacy was higher for beticolin-1 and vitamin E than for tiron (88, 80 and 52%, respectively).