Necrotic cell death induced by dithianon on Saccharomyces cerevisiae

Pesticide Biochemistry and Physiology
F J ScariotS Echeverrigaray

Abstract

Dithianon is a broad-spectrum anthraquinone fungicide used to control several diseases of grapes, apples, and other fruits and vegetables. Its mode of action is described as multi-site and associated to thiol-reactivity. As other fungicides can affect non-phytopathogenic organisms as yeasts and bacteria, with impact on microbial population, diversity, and fermentation processes. In this context, we study the effect of dithianon on the model organism and fermentative yeast Saccharomyces cerevisiae in order to elucidate the mechanisms involved in yeast cell death., and explain its interference on wine fermentation kinetics. Thus for, we analyzed cellular protein and non-protein thiols, membrane and cell wall integrity, reactive oxygen species accumulation, mitochondrial membrane potential, and phosphatidylserine externalization. The results showed that when exponentially aerobic growing cells of S. cerevisiae are submitted to acute dithianon treatment they loss cell wall and membrane integrity, dying by necrosis, and this behavior is associated to a depletion of reduced proteic and non-proteic thiol groups. We also detected an important increase of cellular reactive oxygen species (ROS) associated to mitochondrial membrane potent...Continue Reading

Citations

Feb 2, 2021·Pesticide Biochemistry and Physiology·Inna Yu VitkalovaVasily N Popov
Aug 24, 2020·Pesticide Biochemistry and Physiology·Mikhail Y SyromyatnikovVasily N Popov
Mar 31, 2021·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Angelo GavaAlexandre Meneghello Fuentefria

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