Fig 4. Differentially expressed genes encoding ROS and redox-related enzymes in heat, drought, or combined heat and drought treatments in P. dactylifera.

Genes encoding proteins for ROS scavenging and redox-related processes were assigned to a subcellular compartment according to the protein localization in Arabidopsis, and the expression profile of the genes was used to construct the heatmaps. Genes are in rows, the number following the gene name is arbitrary and used to simplify the identification. The experiments (D: drought, H: heat and HD: combined heat and drought) are in columns. Heatmap shows log₂FC of the expressed genes. Red: log₂FC ≥ 1, blue: log₂FC ≤ -1, gray: -1 < log₂FC < 1. SOD: superoxide dismutase, AOX: alternative oxidase, APX: ascorbate peroxidase, GPX: glutathione peroxidase, CAT: catalase, GRX: glutaredoxin, Trx: thioredoxins, PrxR: peroxiredoxin and DHAR: dehydroascorbate reductase (S8 Table).