The function of the NADPH thioredoxin reductase C-2-Cys peroxiredoxin system in plastid redox regulation and signalling

► NTRC allows the use of NADPH for redox regulation in plastids of green and heterotrophic plant organs. ► NTRC is the most relevant reductant of plastid 2-Cys Prxs, and controls its level of overoxidation. ► Chloroplast redox homeostasis is required for lateral root development.