Cell death induced by fumonisin B1 in two maize hybrids: correlation with oxidative status biomarkers and salicylic and jasmonic acids imbalances

OTAIZA GONZÁLEZ, SANTIAGO NICOLÁS; MARY, VERÓNICA SOFÍA; ARIAS, SILVINA L.; BERTRAND LIDWINA; VELEZ, PILAR A.; RODRIGUEZ, MARÍA GISEL; RUBINSTEIN, HÉCTOR R.; THEUMER, MARTIN GUSTAVO

EUROPEAN JOURNAL OF PLANT PATHOLOGY

SPRINGER

Lugar: Berlin; Año: 2022

0929-1873

ungal and plant secondary metabolites modulate host-pathogen interactions. However, the participation of fumonisin B1 (FB1) in the Fusarium verticillioides-maize pathosystem is unclear. In this work, cell death and the reactive oxygen species-phytohormone imbalance interplay as well as their correlation with the FB1 phytotoxicity in two maize genotypes with contrasting resistance to Fusarium ear rot were studied. Resistant (RH) and susceptible hybrid (SH) maize seedlings, grown from uninoculated seeds irrigated with FB1 (1 and 20 μg/mL), were harvested at 7, 14 and 21 days after planting, and were examined for electrolyte leakage (aerial parts) and for oxidative stress biomarkers (aerial parts and roots). The salicylic/jasmonic acid levels associated with cytotoxicity were further explored in seedlings exposed 24 h to FB1 (1 μg/mL) in hydroponics, with and without pre-treatment with the antioxidant ascorbic acid (AA). Cell death increased in