Table 2.
Statistical analyses of ∫ R and ΔLabel values from different metabolic fractions.
| Parameter | ∫ R | Lipids | Sugars | Organic Acids | Amino Acids |
|---|---|---|---|---|---|
| Malate | 0.191 | 0.163 | 0.764 | 0.860 | 0.094 |
| Species | 0.960 | 0.001 | NA | 0.007 | 0.032 |
| Malate∗Species | 0.614 | 0.117 | NA | 0.666 | 0.240 |
| Time | 0.001 | 0.138 | 0.902 | 0.142 | 0.537 |
| Pyruvate | 0.001 | 0.001 | 0.065 | 0.004 | 0.273 |
| Species | 0.015 | 0.001 | NA | 0.001 | 0.782 |
| Pyruvate∗Species | 0.039 | 0.544 | NA | 0.068 | 0.183 |
| Time | 0.129 | 0.028 | 0.925 | 0.101 | 0.494 |
Results of general linear models show light–dark (Time), position-specific (Malate, Pyruvate), and species-specific (Species) differences and their interactions (e.g., Malate∗Species). Please note that we separately performed statistical tests on malate and pyruvate, since a comparison of the absolute ∫ R and ΔLabel values from both substrates is potentially biased by differences in substrate transport from the assimilation site to the site of reaction, mixing with leaf internal substrate pools, and substrate compartmentalization. P-values are indicated. Significant values (P ≤ 0.05) are marked in bold.