Fumonisin B1 induces nuclease activation and salicylic acid accumulation through long-chain sphingoid base build-up in germinating maize
Por:
de la Torre-Hernandez, ME, Rivas-San Vicente, M, Greaves-Fernandez, N, Cruz-Ortega, R, Plasencia, J
Publicada:
1 sep 2010
Resumen:
Fusarium verticillioides is a predominant maize fungal pathogen that causes seed decay, damping-off and seedling blight. Most isolates of this fungus produce fumonisins, which disrupt sphingolipid biosynthesis causing the accumulation of sphingoid long-chain bases (LCB). In the work reported in this paper we tested the effect of fumonisin B1 (FB1) on germinating maize embryos and found that it induced an endonuclease activity and salicylic acid (SA) accumulation that correlate with sphingoid LCB build-up and cell lysis. Exogenously applied sphinganine produced similar effects on these markers. This suggests that fumonisin production contributes to the colonization of this necrotroph by activating the SA pathway and inducing cell death. (C) 2010 Elsevier Ltd. All rights reserved.
Filiaciones:
de la Torre-Hernandez, ME:
Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Quim, Mexico City 04510, DF, Mexico
Rivas-San Vicente, M:
Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Quim, Mexico City 04510, DF, Mexico
Greaves-Fernandez, N:
Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Quim, Mexico City 04510, DF, Mexico
Cruz-Ortega, R:
Univ Nacl Autonoma Mexico, Dept Ecol Func, Inst Ecol, Mexico City 04510, DF, Mexico
Plasencia, J:
Univ Nacl Autonoma Mexico, Dept Bioquim, Fac Quim, Mexico City 04510, DF, Mexico
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