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Net CO2 assimilation and stomatal conductance to water vapour (g w) expressed on a leaf area basis in hybrid poplar after 35 d of treatments
| Net CO2 assimilation (μmol CO2 m−2 s−1) | g w (mol H2O m−2 s−1) | |
| Control | 7.63±0.18 a | 0.073±0.010 a |
| Elevated CO2 | 10.03±1.02 b | 0.044±0.001 b |
| Elevated CO2 and ozone | 8.72±0.93 a,b | 0.038±0.007 b |
| Ozone | 4.19±0.05 c | 0.035±0.001 b |
Values are mean ±SE (n=4). Mean values not sharing a same letter are significantly different at P <0.05.
