Table 3.
Physiological parameters of chickpea plants grown in a[CO2] and e[CO2]
| Treatment | Photosynthetic rate (μmol CO2 m–2 s–1) | Stomatal conductance (mol m–2 s–1) | Internal CO2 concentration (ppm) | Transpiration rate (mmol m–2 s–1) | Intrinsic water use efficiency (μmol CO2 m–2 s–1/mol m–2 s–1) | Instantaneous water use efficiency (μmol CO2 m–2 s–1/mmol m–2 s–1) |
|---|---|---|---|---|---|---|
| Ambient | 17.75 | 0.44 | 305.35 | 5.31 | 40.25 | 3.35 |
| Elevated | 18.41 | 0.38 | 291.24 | 4.79 | 48.12 | 3.84 |
| P value | 0.053 | 0.018 | 0.009 | 0.006 | 0.002 | 0.03 |
Data was recorded at 60 days after emergence