HPCA1 and HSL3: two plasma membrane proteins that probably cooperate to modulate H2O2 signalling under drought conditionsHydrogen peroxideStress responseROS signallingStomatal closure Protein KinasesH 2 O 2 is an essential component of reactive oxygen species (ROS)metabolism and an obligatory side-...
In plant cells, H2O2 triggers an influx of Ca2+ ions, which is thought to be involved in H2O2 sensing and signalling. Here, by using forward genetic screens based on Ca2+ imaging, we isolated hydrogen-peroxide-induced Ca2+ increases (hpca) mutants in Arabidopsis, and identified HPCA1 as a...
Thebiosynthesiso,extracellularH2O2(eH2O2)byNADPHoxi(asesan)superoxi(e)ismutasesorothermechanismsisin(uce)byvariousabiotican,bioticstressesan,internalcuesinanimalsan(plants)an,eH2O2initiatessignallingpathwaystoregulatestressresponsesan,growthan,,evelopment2,5–7.Forexample,eH2O2hasavitalrolethroughouttheplant...