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- W2798193207 abstract "ABSTRACT Nitrated fatty acids (NO 2 -FAs) are formed by the addition reaction of nitric oxide- and nitrite-derived nitrogen dioxide with unsaturated fatty acids. Nitrated fatty acids act as signaling molecules in mammals through the formation of covalent adducts with cellular thiols. The study of NO 2 -FAs in plant systems constitutes an interesting and emerging area. The presence of NO 2 -FA has been reported in olives, peas, rice and in Arabidopsis. To gain a better understanding of the role of NO 2 -FA on plant physiology, we analyzed the effects of exogenous application of nitro-oleic acid (NO 2 -OA) to tomato cell cultures. We found that NO 2 -OA induced reactive oxygen species (ROS) production in a dose-dependent manner via activation of NADPH oxidases, which requires calcium entry from the extracellular compartment and protein kinase activation, a mechanism that resembles the plant defense responses. NO 2 -OA-induced ROS production, expression of plant defense genes and led to cell death. The mechanism of action of NO 2 -OA involves a reduction in the glutathione cellular pool and covalently addition reactions with protein thiols and reduced glutathione. Altogether, these results indicate that NO 2 -OA triggers responses associated with plant defense, revealing its possible role as a signal molecule in biotic stress. Abbreviations •NO 2 nitrogen dioxide •NO nitric oxide FA fatty acid GSH reduced glutathione H2O2 hydrogen peroxyde NO 2 -FA nitro fatty acids NO 2 -Ln nitro-linolenic acid NO 2 -OA nitro-oleic acid OA oleic acid ROS reactive oxygen species" @default.
- W2798193207 created "2018-04-24" @default.
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- W2798193207 date "2018-04-09" @default.
- W2798193207 modified "2023-10-18" @default.
- W2798193207 title "Nitro-Oleic Acid Induced Reactive Oxygen Species Formation and Plant Defense Signaling in Tomato Cell Suspensions" @default.
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- W2798193207 doi "https://doi.org/10.1101/297994" @default.
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