Table 4 Parameters characterising the vulnerability to cavitation of the studied tree species: values of Ψ50 (i.e. the water potential inducing a 50 % loss in hydraulic conductivity) and the slope of drought-induced cavitation variation at Ψ50
Tree species | Ψ50 (MPa) | Slope (% MPa−1) |
|---|---|---|
Betula pendula | −1.84 (0.02) | 139.4 (15.7) |
Carpinus betulus | −3.64 (0.17) | 101.5 (32.0) |
Fagus sylvatica | −3.25 (0.02) | 46.9 (4.4) |
Quercus robur | −2.62 (0.05) | 48.1 (3.4) |
Salix capreae | −1.60 (0.07) | 80.4 (9.2) |