Table 3.
Rates of photosynthesis, photosynthetic nitrogen use efficiency (PNUE) and photosynthetic phosphorus use efficiency (PPUE) per leaf unit in leaves of Embothrium coccineum (Ec), Gevuina avellana (Ga), Lomatia ferruginea (Lf), and Lomatia dentata (Ld) growing in their natural habitat.
| Site | Species | Photosynthesis rate (μmol CO2 m−2 s−1) | PNUE (μmol CO2 g−1 N s−1) | PPUE (μmol CO2 g−1 P s−1) |
|---|---|---|---|---|
| 41.2° S | Ec | 10.6 (0.3) Aa | 6.1 (0.2) ABb | 86.2 (2.8) Ab |
| (Poorest site) | Ga | 7.9 (1.0) Aa | 5.4 (0.7) ABa | 69.5 (7.8) ABa |
| Lf | 7.7 (0.5) Aa | 4.5 (0.3) Ba | 58.8 (3.9) Bb | |
| Lh | 8.7 (0.8) Aa | 7.4 (0.7) Aa | 85.7 (7.5) ABa | |
| 41.5° S | Ec | 12.8 (0.5) Aa | 9.9 (0.8) Aa | 168.8 (11.3) Aa |
| (Richest site) | Ga | 8.1 (0.5) BCa | 4.5 (1.1) Bb | 87.1 (12.2) Ca |
| Lf | 6.7 (0.3) Cb | 5.5 (0.4) Ba | 136.4 (10.0) ABa | |
| Lh | 10.2 (0.7) ABa | 4.5 (0.9) Bb | 102.7 (15.2) BCa |
Each value corresponds to a mean of four samples ± standard error in brackets. Different capital letters indicate significant differences among species within the same site and different lower-case letters indicate significant differences among sites within the same species (P ≤ 0.05).