A putative synergistic response network in flag leaf proteomes to water-deficit and high-N conditions. RWC, relative water content; Pn, net photosynthetic rate; SSC, soluble sugar content; RuBisCO, ribulose-1,5-bisphosphate. carboxylase/oxygenase; PRK, phosphoribulokinase; PGK, phosphoglycerate kinase; TPX, thioredoxin-dependent peroxidase; DHAR, dehydroascorbate reductase; GAPDH, glyceraldehyde 3-phosphate dehydrogenase; TPI, triosephosphate isomerase; FBA, fructose-1,6-bisphosphate aldolase; 6-PGD, 6-phosphogluconate dehydrogenase; PPIase, peptidyl-prolyl cis–trans isomerase. The red arrow represents upregulation, pink and green arrows represent moderate upregulation and downregulation, respectively.