TMEM37 and infection: Based on the dysregulation of the NPR1-dependent gene PR-1 in infected GC plants, we assessed the in planta redox state in wild-type and GC line following infection with the avirulent pathogen PstAvrB. We generated wild-type and GC plants expressing the genetically-encoded GRX-roGFP2 probe, which specifically reports the ratio between the reduced and oxidized forms of glutathione (GSH/GSSG)38.