Figure 1.

Multiple factorial analysis for flag leaves (Panels A–C) and ears (Panels D–F) of potted wheat subjected to two different water regimes under elevated CO₂ and high temperature. Dim, Dimension; DW, dry weight; FW, fresh weight; MC%, moisture content percentage; Pro, proline content; AsA, total content of ascorbate (AsA plus DHA); GSH, total content of glutathione (GSH plus GSSG); SOD, superoxide dismutase; CAT, catalase; APX, ascorbate peroxidase; DHAR, dehydroascorbate reductase; MDHAR, monodehydroascorbate reductase; GR, glutathione reductase. Two factors were defined: ORGAN, which included the flag leaf and ear categories, and TREATMENT, which included control, long water deficit (LWD) and terminal water deficit (TWD) categories. The green biomass and biochemical traits were divided into four groups: Antioxidant Enzymes (CAT, SOD, APX, DHAR, MDHAR and GR), Biomass (FW, DW and MC%), Metabolites (Pro, AsA and GSH), Morphology (Area and DMA). Panels A and D contain the group representation plots showing the correlation between the trait groups of the continuous variables and the two factors with the first and second dimensions of the MFA axes. Triangles represent the relative position of each group with the axes. Panel B and E contain the correlation circle plots showing the correlation of variables with the MFA axes. Panel C and F contain the individuals-MFA plots showing the position of the individuals in the MFA by organ and treatment. Dots indicate individuals. Ellipses around each treatment were added.