Fig. 2.

A schematic diagram showing the central roles of reactive oxygen species (ROS) and nitric oxide (NO) in the signal transduction pathways that facilitate acclimation to stress allowing high crop productivity over a wide range of environmental conditions. ETC, respiratory electron transport chain; NOX, NADPH oxidases; Mit ETC, respiratory electron transport chain; Chl ETC, photosynthetic electron transport chain; Perox, peoxisomes; GOX, glycollate oxidase; NR, nitrate reductase; NOS-like, nitric oxide synthase-like enzymes; GSNO, S-Nitrosoglutathione.