Fig. 4.

Effect of drought priming on net photosynthetic assimilation rate (A _net), stomatal conductance (g _s), and internal CO₂ concentration (C _i) of wheat leaves under drought priming and drought stress. (A, B) A _net under drought priming (A) and drought stress (B). (C, D) g _s under drought priming (C) and drought stress (D). (E, F) C _i under drought priming (E) and drought stress (F). See Fig. 1 legend for abbreviations. Three biological replicates were analysed. Different letters indicated significant differences at P<0.05 among all treatments as determined by Duncan’s multiple range test.