Table 3.
Compounds determined to be of variable importance in projection through partial least-squares discriminant analysis (PLS-DA) on the identified compounds from GC–MS and LC–MS.
| Peel–29 DPA vs. Peel–27 DPA | Pulp–26 DPA vs. Pulp–25 DPA | Pulp–26 DPA vs. Pulp–27 DPA | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Var ID (Primary) | VIP | P-Value | Var ID (Primary) | VIP | P-Value | Var ID (Primary) | VIP | P-Value | |
| 1 | Tryptophan | 1.696 | 0.0005 | Arginine | 1.476 | 0.0025 | Betanin | 1.374 | 0.0028 |
| 2 | Betanin | 1.670 | 0.0109 | Phenylalanine | 1.45 | 0.0488 | Isobetanin | 1.363 | 0.0066 |
| 3 | Malic Acid | 1.669 | 0.0026 | Methionine | 1.431 | 0.0208 | Propanoic Acid | 1.355 | 0.0005 |
| 4 | Quercetin | 1.663 | 0.0001 | Aspartic Acid | 1.413 | 0.0268 | Aspartic Acid | 1.353 | 0.0024 |
| 5 | Tryptamine * | 1.656 | 0.0154 | Vapiprost | 1.402 | 0.0143 | Fructose | 1.345 | 0.0135 |
| 6 | Citramalic Acid * | 1.620 | 0.0269 | Sespendole | 1.388 | 0.0183 | Methionine | 1.339 | 0.0168 |
| 7 | Tyramine * | 1.611 | 0.0046 | Tyramine * | 1.360 | 0.0482 | Alanine | 1.337 | 0.0045 |
| 8 | Tyrosine | 1.604 | 0.0120 | Serine | 1.353 | 0.0224 | Valine | 1.331 | 0.0055 |
| 9 | Fumaric Acid | 1.598 | 0.0060 | Tryptamine * | 1.326 | 0.0351 | Hylocerenin | 1.326 | 0.0208 |
| 10 | Isoleucine | 1.586 | 0.0147 | Alanine | 1.311 | 0.0269 | Tyramine * | 1.325 | 0.0210 |
| 11 | Sucrose | 1.523 | 0.0292 | Glutamine | 1.302 | 0.0369 | Glucose | 1.323 | 0.0235 |
| 12 | Betalamic Acid | 1.466 | 0.0439 | Tryptophan | 1.265 | 0.0393 | Glycoside | 1.322 | 0.0221 |
| 13 | Fucose | 1.448 | 0.0497 | Citramalic Acid * | 1.067 | 0.0306 | Isoleucine | 1.311 | 0.0272 |
| 14 | NA | NA | NA | NA | NA | NA | Tryptamine * | 1.298 | 0.0322 |
| 15 | NA | NA | NA | NA | NA | NA | Citric Acid | 1.295 | 0.0004 |
| 16 | NA | NA | NA | NA | NA | NA | Mannose | 1.283 | 0.0376 |
| 17 | NA | NA | NA | NA | NA | NA | Phyllocatin | 1.274 | 0.0414 |
| 18 | NA | NA | NA | NA | NA | NA | Citramalic Acid * | 1.239 | 0.0160 |
| 19 | NA | NA | NA | NA | NA | NA | GABA | 1.168 | 0.0342 |
Note: VIP, variable importance in the projection. Compounds accompanied with * are representative differential metabolites identified in both the peel and pulp. NA represents no data.