| # Activity | Chemical | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|---|
| 1 | PYRROLIDINE | Fruit Epidermis | -- | 1.5 | * | |
| 1 | PYRROLIDINE | Pericarp | -- | 1.5 | * | |
| 0 | PYROXIDINE | Plant | -- | -- | * | |
| 0 | PUTRESCINE | Bud | -- | -- | Wang, S. Y., Faust, M. 1994. Changes in Polyamine Content During Dormancy in Flower Buds of 'Anna' Apple. J. Amer. Soc. Hort. Sci., 119(1): 70-73. | |
| 4 | PUFA | Fruit | 1050.0 | 6535.0 | -0.37 | USDA's Ag Handbook 8 and sequelae) |
| 43 | PROTOCATECHUIC-ACID | Fruit | -- | -- | * | |
| 0 | PROTEIN | Fruit | 1870.0 | 12800.0 | -1.3 | Pedersen, M. 1987. Nutritional Herbology. Pederson Publishing. Bountiful, Utah. 377 pp. |
| 0 | PROPYL-PROPIONATE | Plant | -- | -- | * | |
| 0 | PROPYL-N-PENTANOATE | Plant | -- | -- | * | |
| 0 | PROPYL-FORMATE | Plant | -- | -- | * | |
| 0 | PROPYL-BUTYRATE | Plant | -- | -- | * | |
| 0 | PROPYL-BUTYRATE | Fruit | -- | -- | * | |
| 0 | PROPYL-ACETATE | Plant | -- | -- | * | |
| 0 | PROPYL-ACETATE | Fruit | -- | -- | * | |
| 0 | PROPYL-2-METHYLBUTYRATE | Plant | -- | -- | * | |
| 2 | PROPIONALDEHYDE | Fruit | -- | -- | * | |
| 0 | PROPANOL | Plant | -- | -- | * | |
| 0 | PROLINE | Plant | 20.0 | 435.0 | -1.05 | * |
| 27 | PROCYANIDINS | Leaf | -- | -- | * | |
| 0 | PROCYANIDIN-OLIGOMERS | Fruit | -- | -- | * |