Figure 1

Drought severity treatments (A = conrol, B = mild, C = severe) affected plant physiology and root exudate concentration concurrently. The percent difference between before (T1) and after treatment (T2) on four physiological metrics: predawn leaf water potential, photosynthesis, stomatal conductance, growth (root:shoot biomass), and two metrics of root exudate concentration: total organic C (TOC) and root exudate total inorganic C (TIC). Lowercase letters indicate significant differences in means among treatments at T2 (p < 0.05, Table 1, Supplementary Table S1). Note the different y-axis scales.