Figure 4.

Percentage (0–100% in the x-axis) of metabolites whose levels (n = 4 to 6) were altered or remained unchanged (P < 0.05; t-test) after 6 days (drought D6 = stress relative to control) or 12 days (drought D12 = stress relative to control) of drought stress, and following 6 days of rewatering for plants stressed for 6 days (rewatering = rewatered relative to stress; recovery = rewatered relative to control). Metabolites were grouped by biochemical families, with 15 phenolic acids, 17 flavonoids, 3 proanthocyanidins, 5 sugars, 4 polyols, 18 amino acids, 6 polyamines and amino acid derivatives, 8 organic acids, 12 unidentified metabolites, and 4 elemental solutes. Within each bin, the proportions of compounds that increased, decreased, or held steady are coded red, green, and gray, respectively.