Table 3.
Examples of metabolites putatively identified from litter extracts of Q. ilex according to litter types (Natural Drought (ND) and Amplified Drought (AD)). RT: Retention Time in minutes, VIP: Variable Important in Projection. mSigma is a constructor quality value of the formula determination. The closer the value is to zero, the more accurate the result.
| Litter Types | VIP | RT (Min) | m/z [M + H]+ | m/z [M − H]− | Molecular Formula [M − H]− | Error (PPM) | mSigma | Putative Identification | Ref. |
|---|---|---|---|---|---|---|---|---|---|
| AD | M615T468 | 7.8 | 617.114 | 615.0987 | C28H23O16 | 0.9 | 9.1 | Quercetin-3-O-(6″-O-galloyl)-b-D-glucopyranoside | [44] |
| AD | M629T496 | 8.26 | 631.129 | 629.1144 | C29H25O16 | 1.1 | 28 | Isorhamnetin 3-(6″-galloylglucoside) | [44] |
| AD | M340T388 (isotope) |
6.47 | 341.086 | 339.0717 | C15H15O9 | 1.5 | 2.3 | Aesculin | [45] |
| ND | M387T49 | 0.81 | / | 387.1143 [M + HCOO]− |
C13H23O13 | 0.5 | 11 | Disaccharide | |
| 341.1086 | C12H21O11 |
0.9 | 13.8 | ||||||
| AD | M330T66 (isotope) |
1.09 | / | 331.0671 | C13H15O10 | −0.5 | 21.6 | galloyl-β-D-glucose | [44] |
| AD | M399T407 | 6.78 | 355.101 | 399.0934 | C16H17O9 | −3.9 | NA | Chlorogenic acid | [46] [47] [48] |
| 353.0875 | C17H19O1 | −3.3 | 23.0 |