Table 1 List of species used for testing our model along with their model-estimated trait values

From: Towards a unified theory of plant photosynthesis and hydraulics

Species

Plant type

Drought duration (days)

Estimated species traits and cost parameters

Original reference

Kp (10−16 m)

ψ50 (MPa)

α

γ

Cedrus atlantica

Gymnosperm

35

0.17

–1.20

0.11

0.10

68

Pseudotzuga menziesii

Gymnosperm

35

0.20

–1.22

0.10

0.11

68

Glycine max

Herb

21

2.29

–0.58

0.08

5.00

69

Helianthus annuus

Herb

12

15.09

–0.35

0.03

5.00

70

Broussonetia papyrifera

Malacophyll angiosperm

∞

4.53

–0.43

0.10

1.30

71

Platycarya longipes

Malacophyll angiosperm

∞

1.54

–0.87

0.09

1.30

71

Pteroceltis tatarinowii

Malacophyll angiosperm

∞

1.86

–0.91

0.11

1.30

71

Allocasuarina luehmannii

Sclerophyll angiosperm

28

0.75

–1.04

0.12

1.23

72

Cinnamomum bodinieri

Sclerophyll angiosperm

∞

3.20

–0.61

0.11

1.30

71

Eucalyptus pilularis

Sclerophyll angiosperm

12

1.71

–0.36

0.10

1.13

43,73

Eucalyptus populnea

Sclerophyll angiosperm

12

0.94

–1.75

0.10

1.97

43,73

Olea europaea var. Chemlali

Sclerophyll angiosperm

60

1.95

–0.93

0.07

1.30

74

Olea europaea var. Meski

Sclerophyll angiosperm

60

1.38

–2.18

0.11

1.30

74

Quercus coccifera

Sclerophyll angiosperm

12

0.91

–1.08

0.09

0.92

75

Quercus ilex

Sclerophyll angiosperm

12

1.32

–1.69

0.11

0.70

75

Quercus suber

Sclerophyll angiosperm

12

2.95

–1.54

0.10

1.86

75

Ficus tikoua

Shrub

∞

4.31

–0.57

0.12

0.28

76

Rosa cymosa

Shrub

∞

0.79

–1.38

0.08

0.74

71

  1. For each species, data on gas exchange for different values of predawn leaf water potential were obtained from ref. 43 that originally compiled them from the sources listed in this table. Three hydraulic traits and two cost parameters were estimated using these data. A value of ∞ for drought duration means that soil water potential was maintained at each value for a long time during the experiment, allowing sufficient time for acclimation. To reduce the degrees of freedom in parameter estimation, we set b = 1 for all species, except for Helianthus annuus for which b was estimated to be 1.4.
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