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Average growth conditions in the glacial and ambient CO2 growth chambers during the experimental period
Light intensity was measured at the pot level. The photoperiod was 12h. Values are averages (± standard deviation) over the growing period.
| Glacial CO2 | Ambient CO2 | |||
|---|---|---|---|---|
| Day | Night | Day | Night | |
| Light (μmol m–2 s–1) | 900±2 | 900±3 | ||
| [CO2] (μl l–1) | 181±4 | 182±2 | 400±2 | 400±2 |
| Temperature (°C) | 27±1 | 17±1 | 27±1 | 17±1 |
| Relative humidity (%) | 70±1 | 70±1 | 70±1 | 70±1 |
