Table 1.
Results of OPLS-DA models comparing the overall or individual metabolic profiles of six Solanum dulcamara accessions that were either left undamaged or induced by feeding damage of the grey field slug (Deroceras reticulatum). The number of plants per treatment (n), cross-validated predictive ability (Q2 in %), explained variance by the first predictive component (R2X(p) in %), explained variance by the first orthogonal component (R2X(o) in %) and number (n) of up- and down-regulated compounds of interest are provided for each model
| Model | n | Q2 | R2X(p) | R2X(o) | n Up | n Down |
|---|---|---|---|---|---|---|
| Overall | 24 | 71.6*** | 3.9 | 8.9 | 3 | 0 |
| GD04 | 4 | 43.0 | 17.1 | 17.8 | 19 | 29 |
| VW08 | 4 | 67.8+ | 20.4 | 14.3 | 42 | 32 |
| OW09 | 4 | 65.4+ | 22.1 | 18.6 | 41 | 28 |
| TW01 | 4 | 75.4* | 27.3 | 19.0 | 33 | 36 |
| FW09 | 4 | 70.3* | 22.1 | 15.0 | 42 | 18 |
| ZD11 | 4 | 74.0* | 23.2 | 19.5 | 31 | 40 |
Symbols indicate significance of the cross-validated model based on 1000 permutations (***P < 0.001, * P < 0.05,+P < 0.1)