Table 2.
Pre-dawn leaf water potential and lamina relative water content (RWC) of D. glomerata and H. lanatus under four climatic scenarios
| 390 ppm | 520 ppm | |||||||
|---|---|---|---|---|---|---|---|---|
| Control | ECE | Control | ECE | |||||
| 3 dates | Before ECE | D1 | D2 | 3 dates | Before ECE | D1 | D2 | |
| D. glomerata | ||||||||
| Leaf water potential (–MPa) | 0.9±0.3 | 1.1±0.3 | 3.3±0.9 | 6.7±0.6 | 0.9±0.2 | 0.9±0.3 | 3.1±0.2 | 7±0 |
| Lamina RWC (%) | 90.9±3.4 | 80.2±2.7 | 53.5±6.1 | 38.2±0.3 | 84.1±8.8 | 84.3±1.7 | 62.3±13.4 | 39.7±6.7 |
| H. lanatus | ||||||||
| Leaf water potential (–MPa) | 1.1±0.3 | 1.3±0.02 | 3.6±0.6 | 7.00±0 | 1.2±0.1 | 1.4±0.4 | 2±0.1 | 7±0 |
| Lamina RWC (%) | 84.3±7.4 | 81.9±5.3 | 65.2±7.3 | 10.8±5.9 | 83.8±5.4 | 79.8±5.0 | 65.7±16.7 | 43.4±18.9 |
Climatic scenarios were two atmospheric CO2 concentrations (390, 520 ppm) with or without an ECE at three dates (before ECE, 17 June; during ECE, D1; end of ECE, D2; see Fig. 1). For the control treatment, average values of the three dates are shown. Data are presented as mean ±SD (n=3)