Table 1.
Effect of irradiance on the activation state of Rubisco in wild type Arabidopsis and the transgenic line, rwt43
| Arabidopsis line | Irradiance (μE m−2 s−1) | Rubisco activity | Activation (%) | |
|---|---|---|---|---|
| Initial | Total | |||
| (μmol min−1 mg−1 prot) | ||||
| Wild type | 1200 | 0.40 ± 0.03 | 0.46 ± 0.08 | 86 ± 3a |
| 75 | 0.35 ± 0.03 | 0.59 ± 0.02 | 60 ± 4b | |
| 25 | 0.13 ± 0.01 | 0.59 ± 0.03 | 23 ± 2c | |
| rwt43 | 1200 | 0.42 ± 0.08 | 0.45 ± 0.07 | 91 ± 4a |
| 75 | 0.45 ± 0.04 | 0.53 ± 0.04 | 85 ± 4a | |
| 25 | 0.47 ± 0.03 | 0.55 ± 0.04 | 87 ± 3a | |
Leaf discs were exposed to the indicated irradiance for 120 min prior to sampling. Letters indicate activation states that are statistically different at the P = <0.001 level