Table 3.
Carbohydrate concentrations in the cytoplasm of mesophyll cells of leaves as well as in the apoplast and in the phloem sap from Quercus robur and Fraxinus excelsiorMean values of n=2–6 independent measurements are shown.
| Cytoplasm (mM) | Apoplast (mM) | Phloem sap (mM) | Phl/Apo ratio | Phl/Cyt ratio | |
|---|---|---|---|---|---|
| Quercus robur | |||||
| Sucrose | 59.8±25.8 | 0.4±0.2 | 1015±119 | 2538 | 17 |
| Oligosaccharides | ND | ND | ND | ||
| Mannitol | ND | ND | ND | ||
| Fraxinus excelsior | |||||
| Sucrose | 29.5±20.6 | 0.1±0.03 | 403±239 | 4030 | 14 |
| Oligosaccharides | 0.0±0.0 | 0.0±0.0 | 612±169 | ND | ND |
| Mannitol | 3.1±0.3 | 2.4±0.4 | 147±70 | 61 | 47 |
ND, not detected.