Significance (※) of components when sample grouping is based on resins’ tapping method
| Compound | VIP (PLS-DA) | P-value (t-test) | Log2 fold change† |
|---|---|---|---|
| 1,4-Cineole | 1.9927 | 6.62E-06 | 2.4897 |
| Terpinen-4-ol | 1.7265 | 2.21E-04 | 1.3314 |
| Estragole | 1.4820 | 2.95E-03 | –0.7253 |
| p-Cymene | 1.3084 | 8.75E-03 | 0.3231 |
| 2-Nonanol | 1.1557 | 0.0296 | –0.3828 |
| α-Copaene | 1.0604 | 0.0360 | 0.4718 |
| γ-Terpinene | 0.8790 | 0.1125 | 0.4138 |
| Limonene | 0.8673 | 0.1324 | 0.2572 |
| Fenchol | 0.6971 | 0.3877 | –0.1622 |
| α-Pinene | 0.6893 | 0.3046 | –0.4170 |
| β-Myrcene | 0.6813 | 0.7898 | 0.0548 |
| Myrtenol | 0.6561 | 0.7157 | –0.0667 |
| α-Terpinolene | 0.6398 | 0.4267 | –0.2152 |
| α-Terpineol | 0.6238 | 0.4139 | –0.1925 |
| β-Caryophyllene | 0.6198 | 0.6455 | 0.1027 |
| Linalool | 0.5889 | 0.3217 | –0.2596 |
| 2-Nonanone | 0.5726 | 0.4197 | –0.1006 |
| Endo-borneol | 0.5575 | 0.3845 | 0.1247 |
| Camphene | 0.3621 | 0.9233 | –0.0230 |
※: significant values with VIP > 1.0 for multivariate analysis and P < 0.05 for univariate analysis are denoted in bold; †: a negative Log2 fold change indicates a direction towards resins of natural tapping