Table 1.
Growth and measurement conditions during the experiments with tomato and rice
| Tomato (cv. Growdena) | Rice (cv. IR64) | |
|---|---|---|
| Growth condition | ||
| Pot size and soil | 10 L, with potting soil | 7 L, with sandy soil |
| Initial nutrients (pot−1) | 1.0 g N, 1.2 g P2O5, and 2.1 g K2O | 0.40 g N |
| Total additional nutrients (pot−1) | 0.38 g N, 0.12 g P2O5, and 0.40 g K2O | 0.50 g N, 0.50 g P2O5 and 0.50 g K2O |
| Temperature (day/night, °C) | 21.4/17.0 | 28/23 |
| Relative humidity (%) | ca 65 | ca 65 |
| Photoperiod (h d−1) | 16 | 12 |
| Supplementary lights on (W m−2) a | ≤ 150 | ≤ 400 |
| Supplementary lights off (W m−2) b | ≥ 250 | ≥ 500 |
| Measurement conditions | ||
| Position of measured leaves (from the bottom) | the 9th layer leaf | the 9th main-culm leaf |
| A − Iinc curves | Iinc = 20, 45, 70, 100, 150, 200, 500, 1000, 1500 µmol m−2 s−1 with Ca = 380 µmol mol−1 at each of O2 levels 2%, 10%, 21%, 35% and 50%, or with Ca = 1000 µmol mol−1 and O2 = 2% | Iinc = 45, 70, 100, 150, 200, 500, 1000, 1500 µmol m−2 s−1 with Ca = 380 µmol mol−1 at each of O2 levels 2%, 10%, 21%, 35% and 50%, or with Ca = 1000 µmol mol−1 and O2 = 2% |
| A − Ci curves | Ca = 50, 65, 80, 100, 150, 200, 380, 760, 1000, 1500 µmol mol−1 with Iinc = 1000 µmol m−2 s−1 at each of O2 levels 2%, 10%, 21%, 35% and 50% | Ca = 50, 65, 80, 100, 150, 200, 380, 600, 1000, 1500 µmol mol−1 with Iinc = 1000 µmol m−2 s−1 at each of O2 levels 2%, 10%, 21%, 35% and 50% |
| Leaf temperature (°C) | 25 | 25 |
| Leaf-to-air vapour pressure difference (kPa) | 0.7–1.5 | 0.7–1.5 |
aThreshold solar incident light outside glasshouse when supplementary lights were switched on;
bThreshold solar incident light outside glasshouse when supplementary lights were switched off