PCA-LDA Loadings | Wavenumber (cm− 1) | Vibrational Mode | Biochemical Assignment |
---|---|---|---|
LD1 | 1719 | ν(C=O· · ·H) ester ν(C=O) | Cutin Pectin, lipid, polysaccharides, phenolic compounds |
1603 | ν(C-C) aromatic ν(COO), ν(C=C) | Phenolic compounds Pectin, lignin | |
1561 | ν(C-C) aromatic | Phenolic compounds | |
1215 | νaPO2 Amide III | Phosphate Proteins | |
1156 | ν(C-OH) νa(C-O-C) ester | Cellulose, polysaccharide Cutin, pectin | |
1078 | ν(C-O), ν(C-C) ν(C-OH) νsPO2 | Xyloglucan Oligosaccharide Phosphate | |
LD2 | 1632 | ν(C=C) phenolic acid νs(C-C) ring Amide I | Phenolic compounds Cellulose Proteins |
1575 | ν(C=N) ν(C-C) phenyl group | Proteins Phenolic compounds | |
1539 | Amide II ν(C=N) | Proteins Lignin | |
1504 | ν(C=C) ν(C-H) Amide II | Lignin Carotenoid Protein | |
1473 | δ(CH2) scissoring | Glycerolipids, wax hydrocarbons | |
1160 | νa(C-O-C) ester ν(C-OH), ν(C-O-C) | Cutin Cellulose, polysaccharide | |
LD3 | 1721 | ν(C=O) ester ν(C=O) | Cutin, pectin Phenolic compounds, lipids, polysaccharides |
1561 | ν(C-C) aromatic | Phenolic compounds | |
1239 | Amide III ν(C-O) | Proteins Pectin | |
 | Cellulose / hemicellulose | ||
νaPO2 | Phosphate | ||
1218 | Amide III νaPO2 | Proteins Phosphate | |
1156 | νa(C-O-C), ester ν(C-OH), ν(C-O-C) | Cutin Polysaccharide, cellulose | |
1041 | ν(C-O), ν(C-C) ν(O-CH2) | Cellulose Arabinogalactan |