Table 1.
Climate conditions and leaf characteristics (order and age) for the photosynthetic measurements
| Year | Measurement date | Tg (°C) | PPF (mol m−2 d−1) | Leaf order | Mean leaf age (d) |
|---|---|---|---|---|---|
| 2003 | 18–24 June | 17·7 | 34·9 | 8th | 13 |
| 15–25 July | 18·5 | 25·3 | 11th | 18 | |
| 20–30 August | 20·9 | 23·7 | 14th | 17 | |
| 11–15 September | 19·1 | 22·0 | 15th | 40 | |
| 2004 | 23–28 June | 18·1 | 36·9 | 9th | 15 |
| 21–26 July | 21·7 | 22·6 | 12th | 14 | |
| 21–23 August | 21·9 | 31·3 | 13th | 16 | |
| 14–18 September | 19·7 | 24·9 | 14th | 31 |
Tg and PPF are the mean daily growth temperature and mean daily photosynthetic photon flux, respectively, in the 2 weeks prior to measurements. Leaf order was numbered from the first leaf after germination.