Figure 5.
A, Petiole conductance, as percentage maximum flushed values, versus branch water potential. Black circles, Petioles sampled at native water potentials; white circles, petioles sampled after relaxing branches to −1.7 to −0.1 MPa from their native minimum water potentials (plotted). B, Kl versus initial branch water potential; the line is a best-fit Weibull function. C, Leaf conductances from branches dried to a minimum water potential and rehydrated to between −1.6 and −0.9 MPa, then reequilibrated before measuring Kl. Rehydrated Kl is plotted versus branch minimum water potential (white circles), and the rehydrated branch water potential was measured at the time of the experiment (black circles); data in gray are Kl values replotted from B for comparison.