Table 2. Time (minutes) to reach 50 and 90% of steady-state photosynthesis rates (tA50, tA90) after step increases in irradiance.
| Genotype | 0 → 1000 μmol m−2 s−1 |
70 → 800 μmol m−2 s−1 |
130 → 600 μmol m−2 s−1 |
|||
|---|---|---|---|---|---|---|
| tA50 | tA90 | tA50 | tA90 | tA50 | tA90 | |
| Col-0 | 1.6 ± 0.1 | 14.7 ± 1.2 | 1.3 ± 0.1 | 10.2 ± 1.1 | 0.6 ± 0.0 | 9.0 ± 2.2 |
| rca-2 | 1.5 ± 0.2 | 25.5 ± 1.5*** | 6.3 ± 0.4*** | 30.9 ± 2.0*** | 4.0 ± 0.7*** | 29.8 ± 1.7*** |
| rwt43 | 1.2 ± 0.1** | 14.2 ± 2.6 | 0.5 ± 0.0*** | 16.2 ± 6.1 | 0.3 ± 0.0*** | 18.8 ± 6.1 |
| spsa1 | 1.6 ± 0.1 | 19.5 ± 1.3* | 1.3 ± 0.1 | 14.1 ± 7.2 | 0.6 ± 0.1 | 13.7 ± 6.9 |
| aba2-1 | 1.4 ± 0.1 | 7.3 ± 0.5** | 1.3 ± 0.1 | 7.7 ± 2.6 | 0.8 ± 0.1 | 15.1 ± 5.8 |
| C24 | 1.9 ± 0.1 | 15.0 ± 3.2 | 1.7 ± 0.3* | 13.3 ± 2.7 | 0.9 ± 0.2* | 29.4 ± 5.1*** |
| npq1-2 | 1.4 ± 0.1 | 11.7 ± 1.7 | 1.3 ± 0.1 | 10.7 ± 2.9 | 0.7 ± 0.0 | 14.6 ± 8.6 |
| npq4-1 | 1.5 ± 0.1 | 14.8 ± 2.6 | 1.1 ± 0.1 | 6.1 ± 0.7 | 0.6 ± 0.0 | 15.3 ± 11.0 |
Averages ± SEM, n = 5–15. Stars within columns denote significance levels compared to Col-0: ***P < 0.0001, **P < 0.01, *P < 0.05. Absence of stars denotes lack of significant difference with Col-0 (P > 0.05).