Table 3.
Change ( %) in net photosynthesis rate or intrinsic water use efficiency (WUEi) if either Rubisco activated directly after illumination or stomatal conductance directly increased to its final, steady-state value
| Treatment | Net photosynthesis rate |
WUEi |
||
|---|---|---|---|---|
| Rubisco kinetics | Stomatal opening | Rubisco kinetics | Stomatal opening | |
| 20 Pa | 7·5±1·5 | 3·6±0·8 | 24·7±1·7 | −32·1±2·0 |
| 40 Pa | 5·6±0·4 | 1·1±0·1 | 12·2±0·9 | −20·6±1·4 |
| 80 Pa | 2·5±0·6 | 0·6±0·1 | 5·8±0·8 | −19·8±2·2 |
| 15·5 °C | 5·2±0·7 | 1·4±0·3 | 11·7±1·8 | −24·7±6·3 |
| 22·8 °C | 5·6±0·4 | 1·1±0·1 | 12·2±0·9 | −20·6±1·4 |
| 30·5 °C | 4·1±0·9 | 3·3±1·2 | 11·5±1·3 | −13·9±2·6 |
| 0·5 kPa | 4·9±0·4 | 1·4±0·4 | 11·5±1·3 | −23·3±3·6 |
| 0·8 kPa | 5·6±0·4 | 1·1±0·1 | 12·2±0·9 | −20·6±1·4 |
| 1·6 kPa | 7·6±0·6 | 0·6±0·2 | 18·5±2·2 | −15·6±2·5 |
| 2·3 kPa | 8·0±0·8 | 0·7±0·1 | 17·3±2·1 | −13·7±2·1 |
Values are means over minutes 2–60 during photosynthetic induction ± SE (n = 5).