Table 1.
Reported concentration of melatonin in some edible plants.
| Crop | Used Methodology | Melatonin Content (pg/g FW(DW) Tissue) | Reference |
|---|---|---|---|
| Apple | GC-MS | 0.16 | [40] |
| Asparagus | RIA | 9.5 | [41] |
| Barley | LC | 500–12,000 R; 82,300 S | [42,43] |
| Cucumber fruit seeds | RIA | 24.6, 11,000 | [41,44] |
| Chilies | UHPLC-MS/MS | 31–93 | [45] |
| Kiwi | RIA | 0.02 | [41] |
| Kidney bean | ELISA | 529 DW | [46] |
| Rice | HPLC | 100 L; 500 S; 200 R; 400 Fl | [47,48] |
| Sunflower | HPLC | 29,000 DW | [16] |
| Tea (Shiya green tea) | HPLC | 2.12 μg g−1 | [49] |
| Tomato | LC | 15,000–142,000 L | [50] |
| Wheat | LC | 124,700 S | [42] |
Abbreviation: L = leaf, R = roots, FL = flower, GC-MS = gas chromatographic-mass spectroscopy, RIA = radioimmunoassay, LC = liquid chromatography, UHPLC-MS/MS = Ultra-high performance liquid chromatography coupled to mass spectrometry in tandem mode, ELISA = Enzyme-linked immunosorbent assay, HPLC = High performance liquid chromatography.