Figure 7.

Principal component analysis and Pearson correlations using morphophysiological and biochemical data on soybean plants in response to water deficit and KI application. Significant correlation coefficients (q < 0.01) are indicated with bold numbers, where positive and negative correlations are distinguished with red and blue, respectively. Non-significance is indicated with white boxes without numbers. TDM—total dry mass; SDM—shoot dry mass; RDM—root dry mass; WDTI—water index tolerance; H₂O₂—hydrogen peroxide; MDA—malondialdehyde; A—CO₂ assimilation rate; g_s—stomatal conductance; C_i—internal concentration of CO₂; E—transpiration; WUE—water use efficiency; CE—carboxylation efficiency; POD—guaiacol peroxidase; APX—ascorbate peroxidase; CAT—catalase.