Fig. 4
Graphs of values of shoot hydraulic conductance (Kshoot) under a high evaporative demand [38 °C, vapor pressure deficit (VPD) > 3 kPa] in a controlled environment (a) and the fraction of transpirable soil water (FTSW) threshold under progressive soil drying (b) versus the normalized transpiration rate (NTR) slope after FTSW threshold. R2 = 0.55, P = 0.03 (a). R2 = 0.84, P = 0.001 (b)