Figure 3.

The water potential at which 50 % of hydraulic conductivity is lost (P₅₀) as calculated from vulnerability curves versus the water potential at which 50 % of xylem water was released ($P_{50}^{\mathrm{\prime }}$) as calculated from native water extraction curves, both constructed using the 27 cm diameter rotor in the Cavitron (dashed line). The solid line represents the 1 : 1 line. Eucalyptus (open circle) is not included in the linear regression.