Table 3.
Contribution of different components of cellular resistance to the total cellular resistance, estimated from the anatomical model for the 32 study species from five sites*1
A constant mesophyll cell wall porosity of 0.05 was assumed for all species.
| Species | Sitea | Contribution to total cellular resistance (%) | |||
|---|---|---|---|---|---|
| Stroma | Cell walls | Cytosol | Membranesb | ||
| Acacia longifolia | HRHN | 30.7 | 55.5 | 4.3 | 9.2 |
| Acacia myrtifolia | HRLN | 26.2 | 59.5 | 5.0 | 9.2 |
| Acacia suaveolens | HRLN | 24.0 | 62.6 | 4.7 | 8.7 |
| Angophora hispida | HRLN | 21.8 | 66.3 | 2.9 | 9.0 |
| Astrotrichia floccosa | HRHN | 27.8 | 57.2 | 3.8 | 11.2 |
| Banksia aemula | LRLN | 20.5 | 65.4 | 4.5 | 9.6 |
| Banksia integrifolia | MQ | 29.9 | 56.1 | 4.5 | 9.6 |
| Banksia marginata | HRLN | 19.5 | 68.2 | 3.3 | 9.0 |
| Banksia oblongifolia | HRLN | 20.3 | 66.6 | 4.2 | 9.0 |
| Banksia robur | MQ | 30.3 | 55.1 | 4.7 | 10.0 |
| Banksia serrata | MQ | 22.7 | 64.8 | 4.0 | 8.7 |
| Banksia serrata | HRLN | 22.7 | 64.5 | 4.1 | 8.7 |
| Banksia spinulosa | LRHN | 20.8 | 66.1 | 4.2 | 8.9 |
| Eriostemon australasius | HRLN | 25.4 | 60.4 | 4.5 | 9.6 |
| Eucalyptus fibrosa | LRHN | 18.0 | 69.0 | 4.1 | 8.6 |
| Eucalyptus haemastoma | LRHN | 29.9 | 55.9 | 3.3 | 10.9 |
| Eucalyptus sclerophylla | LRLN | 18.1 | 69.9 | 3.4 | 8.6 |
| Eucalyptus umbra | HRHN | 20.1 | 67.8 | 3.7 | 8.5 |
| Grevillea speciosa | HRLN | 20.5 | 60.0 | 4.3 | 9.2 |
| Hakea dactyloides | HRLN | 18.9 | 68.5 | 4.0 | 8.6 |
| Lambertia formosa | HRHN | 28.1 | 57.5 | 4.6 | 9.8 |
| Lambertia formosa | HRLN | 22.2 | 65.1 | 4.2 | 8.5 |
| Macadamia ternifolia | MQ | 21.4 | 64.4 | 4.5 | 9.7 |
| Macrozamia communis | HRHN | 32.0 | 52.6 | 5.1 | 10.3 |
| Macrozamia spiralis | LRHN | 19.6 | 67.0 | 4.3 | 9.2 |
| Notolea longifolia | HRHN | 21.0 | 65.8 | 4.0 | 9.2 |
| Persoonia lanceolata | HRLN | 25.2 | 60.7 | 4.5 | 9.6 |
| Persoonia laurina | LRLN | 26.3 | 59.3 | 4.6 | 9.8 |
| Persoonia laurina | LRHN | 23.2 | 62.6 | 4.6 | 9.7 |
| Persoonia levis | HRLN | 27.3 | 58.1 | 4.7 | 9.9 |
| Pittosporum undulatum | MQ | 30.4 | 54.8 | 4.8 | 10.0 |
| Polyscias sambucifolia | MQ | 31.7 | 52.4 | 5.3 | 10.6 |
| Syncarpia glomulifera | HRHN | 30.3 | 55.3 | 4.5 | 9.8 |
| Synoum glandulosum | HRHN | 27.5 | 57.2 | 4.7 | 10.6 |
| Xylomelum pyriforme | HRHN | 24.2 | 62.1 | 4.3 | 9.4 |
a Site codes as in Table 2.
b Membrane contribution is determined by the permeabilities of plasmalemma and chloroplast envelope membranes. These permeabilities were fixed at a constant value of 0.0035 m s–1 for all species. However, the contribution of membrane permeabilities to total cellular resistance varies due to the variation in numerical values for the other components of the diffusion pathway.