Fig. 2.

Hydrostatic root hydraulic conductivity (Lp_r–h) (a), and its relation with the osmotically root hydraulic conductivity (Lp_r–o) (b) in Col‐0, and in a collection of 16 Casparian strips (CS) and/or suberin mutants in Arabidopsis. The plants that were grown hydroponically for 19 to 21 d under environmental controlled conditions, and measured using pressure chambers (Lp_r–h) (means ± SE, n = 15–20, n = 3) or by the exudation method (Lp_r–o) (means ± SE, n = 20–25, n = 3). In (a), anac038‐2 is presented at a ‘virtual Lpr’ of 119.38 with respect to a wild‐type (WT) value of 134.08 ml g⁻¹ h⁻¹ MPa⁻¹, when ‘real values’ obtained during a dedicated experiment were of 205.0 and 230.2 ml g⁻¹ h⁻¹ MPa⁻¹, respectively. One‐way ANOVA and Tukey’s test were used to determine significant differences (α = 0.05). Data of Lp_r–h for pCASP1::CDEF1 are the same as in Wang et al. (2019).