Fig. 7

A heatmap showing fold-changes of activities of antioxidant enzymes in onion genotypes under control (C) and drought (D) conditions. Each row represents one genotype, and each column represents one parameter (Catalase (CAT), Superoxide Dismutase (SOD), Ascorbate Peroxidase (APX)) under each condition (C, D). The color intensity indicated the relative value (z-score) of each parameter, with yellow indicating low values, white representing intermediate values, and gray representing the highest values.