Fig. 3
Graphs of values of cotton cultivars’ average shoot hydraulic conductance (Kshoot) under a high evaporative demand [38 °C, vapor pressure deficit (VPD) > 3 kPa] in a controlled environment versus various drought tolerance parameters. Correlations include: Kshoot and difference in stomatal conductance (gs, mol (H2O)·m−2·s−1) between a low evaporative demand (32 °C, VPD = 1∼1.5 kPa) and a high evaporative demand environment in controlled environments (a); vapor pressure deficit (VPD) breakpoint (b); water use efficiency coefficient (WUEk, Pa) (c); total leaf area (cm2) (d); leaf dry weight (g) and (e); and fraction of transpirable soil water (FTSW) threshold under progressive soil drying (f). R2 = 0.37, P = 0.05 (a); R2 = 0.39, P = 0.05 (b); R2 = 0.25, P = 0.14 (c); R2 = 0.56, P = 0.01 (d); R2 = 0.71, P = 0.002 (e); R2 = 0.32, P = 0.13 (f)