Table I. Comparison of mean Pe and water potential associated with 50% loss of hydraulic conductance (P50) values for leaves (n = 3) and stems (n = 3) of our eight sample Quercus species

Values shown are means ± se (n = 3).

SpeciesTissueTrait
PeP50
MPa
Q. sadlerianaLeaf−1.78 ± 0.08−2.72 ± 0.25
Stem−1.17 ± 0.04−2.74 ± 0.20
Q. garryanaLeaf−1.70 ± 0.25−2.81 ± 0.27
Stem−1.99 ± 0.35−3.32 ± 0.56
Q. kelloggiiLeaf−2.47 ± 0.18−3.62 ± 0.13
Stem−3.28 ± 0.58−4.73 ± 0.64
Q. lobataLeaf−2.4 ± 0.24−3.02 ± 0.18
Stem−2.8 ± 0.40−3.58 ± 0.25
Q. wislizeniiLeaf−3.10 ± 0.29−3.77 ± 0.13
Stem−3.35 ± 0.31−4.10 ± 0.24
Q. agrifoliaLeaf−2.89 ± 0.22−4.47 ± 0.31
Stem−3.56 ± 0.19−4.32 ± 0.26
Q. douglasiiLeaf−3.13 ± 0.26−4.45 ± 0.24
Stem−4.91 ± 0.3−6.27 ± 0.06
Q. berberidifoliaLeaf−3.74 ± 0.23−5.52 ± 0.62
Stem−4.24 ± 0.18−5.95 ± 0.38