Table 4. The results of Principal Component Analysis (PCA) and Redundancy Analysis (RDA).
The correlations of variables with the first three principal components (PC1-PC3, RDA1-RDA3) and cannonical correlations of leaf chlorophyll content and genetic diversity with Chl a fluorescence parameters were shown. Values ca. 0.7 are marked in bold.
| Parameters/Axes | PC1 | PC2 | PC3 |
| Eigenvalues | 9.802 | 4.092 | 2.55 |
| Variation explained (%) | 54.45 | 22.73 | 14.16 |
| Cumulative proportion (%) | 54.45 | 77.19 | 91.35 |
| Fo ~ F50 μs | -0.083 | -0.597 | -0.773 |
| VI | -0.959 | 0.047 | -0.148 |
| VK | -0.193 | -0.879 | 0.179 |
| FM | -0.222 | 0.123 | -0.915 |
| N | 0.902 | -0.219 | 0.220 |
| SM | 0.695 | -0.015 | 0.464 |
| PItotal | 0.962 | -0.189 | 0.035 |
| PIABS | 0.829 | 0.352 | -0.373 |
| TR0/RC | 0.971 | 0.175 | -0.128 |
| DI0/RC | -0.825 | -0.527 | 0.082 |
| ET0/RC | 0.925 | 0.015 | -0.296 |
| RE0/RC | 0.964 | -0.224 | 0.045 |
| RC/CS0 | -0.656 | -0.020 | -0.586 |
| ψo | 0.758 | 0.492 | -0.333 |
| φPo | -0.223 | 0.921 | 0.058 |
| φDo | 0.177 | -0.963 | -0.032 |
| γRC | 0.688 | -0.598 | -0.249 |
| PG | 0.956 | -0.054 | -0.149 |
| Canonical axes | RDA1 | RDA2 | RDA3 |
| Eigenvalue | 5.020 | 4.679 | 2.582 |
| Variance explained (%) | 28.90 | 24.80 | 12.792 |
| Cumulative variance (%) | 28.90 | 53.70 | 66.49 |
| G | 0.814 | -0.209 | 0.521 |
| PPL | 0.347 | -0.363 | 0.342 |
| Pareto (beta) index | 0.843 | -0.488 | 0.218 |
| Chltot | -0.714 | -0.302 | 0.246 |
| Chl a/b ratio | 0.485 | 0.019 | -0.309 |
| Residual variance | 0.335 |