R-type anion channel activation is an essential step for ROS-dependent innate immune response in Arabidopsis suspension cells

Functional Plant Biology : FPB
J ColcombetJ M Frachisse

Abstract

Plants are constantly exposed to environmental biotic and abiotic stresses. Plants cells perceive these factors and trigger early responses followed by delayed and complex adaptation processes. Using cell suspensions of Arabidopsis thaliana (L.) as a cellular model, we investigated the role of plasma membrane anion channels in Reactive Oxygen Species (ROS) production and in cell death which occurs during non-host pathogen infection. Protoplasts derived from Arabidopsis suspension cells display two anion currents with characteristics very similar to those of the slow nitrate-permeable (S-type) and rapid sulfate-permeable (R-type) channels previously characterised in hypocotyl cells and other cell types. Using seven inhibitors, we showed that the R-type channel and ROS formation in cell cultures present similar pharmacological profiles. The efficiency of anion channel blockers to inhibit ROS production was independent of the nature of the triggering signal (osmotic stress or general elicitors of plant defence), indicating that the R-type channel represents a crossroad in the signalling pathways leading to ROS production. In a second step, we show that treatment with R-type channel blockers accelerates cell death triggered by the ...Continue Reading

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Citations

Nov 6, 2010·Plant Signaling & Behavior·Eugene DiatloffJean-Marie Frachisse
Nov 10, 2009·Plant, Cell & Environment·Natasha L Teakle, Stephen D Tyerman
Feb 1, 2011·Annual Review of Plant Biology·Hélène Barbier-BrygooStefanie Wege
Mar 15, 2013·Journal of Experimental Botany·Saed SaeediGabriel Roblin
Nov 14, 2016·Cellular and Molecular Life Sciences : CMLS·Sunita A RameshBo Xu
Sep 15, 2018·Communicative & Integrative Biology·Takamitsu KurusuKazuyuki Kuchitsu
Jul 26, 2011·The Plant Journal : for Cell and Molecular Biology·Sandra KoersM Rob G Roelfsema
Sep 25, 2019·International Journal of Molecular Sciences·José M Colmenero-FloresMiguel A Rosales
Mar 13, 2015·Plant Signaling & Behavior·Wei GuoJin-Long Qiu
Sep 2, 2019·Plant Physiology and Biochemistry : PPB·Fabienne DédaldéchampGabriel Roblin

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