Table 2.

Leaf anatomical parameters

Data are ±SE; n=3–5. F_ias, average fraction of intercellular airspace; T_cwm, mesophyll cell wall thickness; T_cyt, cytoplasm thickness; T_chl, chloroplast thickness.

Species	F ias	T cwm (μm)	T cyt (μm)	T chl (μm)
Selaginella uncinata	0.30 ± 0.03	0.22 ± 0.03	0.382 ± 0.033	2.359 ± 0.050
Psilotum nudum	0.15 ± 0.01	1.074 ± 0.074	0.177 ± 0.043	4.1 ± 0.3
Araucaria heterophylla	0.37 ± 0.09	0.67 ± 0.08	0.09 ± 0.01	2.727 ± 0.092
Cycas revoluta	0.20 ± 0.01	0.34 ± 0.05	0.215 ± 0.093	5.36 ± 0.10
Macrozamia riedlei	0.20 ± 0.03	0.37 ± 0.02	0.218 ± 0.009	3.918 ± 0.041
Ephedra minuta	0.21 ± 0.04	0.731 ± 0.010	0.299 ± 0.065	3.19 ± 0.12
Metasequoia glyptostroboides	0.29 ± 0.02	0.26 ± 0.05	0.091 ± 0.020	1.97 ± 0.06
Pinus sylvestris	0.21 ± 0.02	0.32 ± 0.08	0.089 ± 0.005	2.25 ± 0.22
Picea abies	0.18 ± 0.04	0.58 ± 0.05	0.070 ± 0.024	2.79 ± 0.11
Taxus baccata	0.30 ± 0.02	0.876 ± 0.042	0.087 ± 0.003	3.1 ± 0.2
Podocarpus alpinus	0.223 ± 0.008	1.18 ± 0.09	0.088 ± 0.009	2.09 ± 0.11
Podocarpus nivalis	0.26 ± 0.06	1.22 ± 0.09	0.092 ± 0.002	2.1 ± 0.2
Cupressus sempervirens	0.063 ± 0.003	0.91 ± 0.08	0.30 ± 0.09	2.81 ± 0.25