Table 2.
Control treatment seasonal variation in Jmax, maximum rate of electron transport (μmol m−2 s−1) and Vcmax, maximum rate of Rubisco activity (μmol m−2 s−1).
| Julian day |
|||||||
|---|---|---|---|---|---|---|---|
| 137 | 157 | 179 | 198 | 227 | 240 | 283 | |
| Acer rubrum | |||||||
| Jmax | 186·3 | 257·8 | 192·8 | 192·3 | 154·0 | 85·0 | 13·6 |
| Vcmax | 62·4 | 75·4 | 72·6 | 62·3 | 66·1 | 57·5 | 5·2 |
| Betula nigra | |||||||
| Jmax | 223·8 | 244·8 | 342·3 | 201·5 | 245·5 | 131·2 | 11·4 |
| Vcmax | 69·5 | 87·6 | 74·7 | 86·5 | 97·7 | 76·2 | 4·3 |
| Paulownia elongata | |||||||
| Jmax | 215·0 | 301·5 | 262·0 | 181·5 | 245·8 | 91·9 | 13·8 |
| Vcmax | 71·5 | 78·6 | 88·7 | 65·1 | 77·2 | 46·0 | 5·9 |
| Quercus nuttallii | |||||||
| Jmax | 79·2 | 175·8 | 195·5 | 149·0 | 114·6 | 70·6 | 16·0 |
| Vcmax | 42·1 | 69·7 | 65·7 | 64·2 | 50·5 | 41·5 | 7·5 |
| Quercus phellos | |||||||
| Jmax | 96·2 | 165·8 | 160·0 | 119·0 | 123·1 | 75·8 | 22·1 |
| Vcmax | 45·9 | 66·2 | 63·9 | 47·7 | 51·2 | 42·1 | 7·2 |