TABLE 5.
Direct effects of predictor variables of first-, second-, third-, and fourth-order on germination rate, tolerance and variance inflation factor of the path analysis.
| Response variable | Predictor varibles | Adjusted R2 | Direct effect | Tolerance | VIF |
| GR | K | 0.558 | 0.430 | 0.771 | 1.297 |
| Mg | −0.300 | 0.852 | 1.174 | ||
| Mn | −0.282 | 0.681 | 1.468 | ||
| K | Zn | 0.646 | −0.682 | 0.865 | 1.156 |
| TPC | 0.256 | 0.865 | 1.156 | ||
| Mg | Ca | 0.498 | 0.615 | 1.000 | 1.000 |
| TFC | −0.382 | 1.000 | 1.000 | ||
| Mn | Zn | 0.507 | 0.609 | 0.742 | 1.348 |
| Ca | 0.270 | 0.965 | 1.036 | ||
| TPC | 0.293 | 0.837 | 1.195 | ||
| Cu | 0.242 | 0.817 | 1.224 | ||
| Zn | TFC | 0.434 | −0.457 | 0.841 | 1.190 |
| Protein | 0.348 | 0.841 | 1.190 | ||
| TPC | TFC | 0.406 | 0.489 | 0.836 | 1.197 |
| Yield | 0.282 | 0.836 | 1.197 | ||
| Ca | Fe | 0.136 | 0.391 | 1.000 | 1.000 |
| Cu | FRAP | 0.131 | −0.385 | 1.000 | 1.000 |
| Protein | Yield | 0.353 | −0.432 | 0.871 | 1.148 |
| Fe | 0.309 | 0.871 | 1.148 |
Subsequent multiple linear regression analyses were performed. GR, germination rate; TFC, total flavonoid content; TPC, total phenolic content; FRAP, antioxidant capacity.