Table I. Oxidized fatty acyl chains detected in extracts from leaves of Arabidopsis infected with PstAvr for 24 h.
Examples of possible structures and fragmentation of ox-lipids from each class are shown in Supplemental Figure S1.
| Triple Quadrupole MS Precursor Scan | Chemical Formula of Oxidized Fatty Acyl Anion | m/z of Anion | Abbreviation | Examples of Compounds Consistent with Detected Formula |
| Acyl formulas directly scanned | ||||
| Pre 291.20 | C18H27O3 | 291.1966 | 18:4-O | OPDA, keto 18:3 |
| Pre 293.21 | C18H29O3 | 293.2122 | 18:3-O | Hydroxy 18:3, keto fatty acid |
| Pre 295.23 | C18H31O3 | 295.2279 | 18:2-O | Hydroxy 18:2 |
| Pre 291.20 | C18H29O4 | 309.2071 | 18:3-2O | Ketol fatty acid, hydroperoxy 18:3, dihydroxy 18:3 |
| Pre 293.21 | C18H31O4 | 311.2228 | 18:2-2O | Hydroperoxy 18:2, dihydroxy 18:2 |
| Acyl formulas identified by scanning of the above anions or as a result of QTOF MS analysis | ||||
| – | C16H23O3 | 263.1653 | 16:4-O | dnOPDA |
| – | C16H25O3 | 265.1809 | 16:3-O | Hydroxy 16:3 |
| – | C16H25O4 | 281.1758 | 16:3-2O | Ketol fatty acid, hydroperoxy 16:3, dihydroxy 16:3 |
| – | C18H25O4 | 305.1758 | 18:5-2O | – |