The observed decrease in expression of a number of genes coding for antioxidant enzymes in the chloroplast (SOD, MDAR, DHAR, GPX, PrxR, and Trx) or in the cytosol (Trx and GRX) upon PAMP perception or bacterial infection (Supplemental Figure S5) may explain the increase in roGFP2-Orp1 oxidation in these compartments. The gene discussed is SOD1; the disease is bacterial infectious disease.