Table 3.
Spearman’s correlation between phenolic acids. Correlation analysis was performed on 72 replicates (4 rice varieties × 3 sampling times × 3 replicates × 2 years). *: p ≤ 0.05; **: p ≤ 0.01.
| Phenolic Acid | Chlorogenic Acid | Syringic Acid | 4-hydroxybenzoic Acid | p-Coumaric Acid | Ferulic Acid | Protocatecuic Acid | Gallic Acid |
|---|---|---|---|---|---|---|---|
| Chlorogenic acid | 1 | −0.294 * | −0.253 | 0.182 | −0.565 ** | −0.198 | 0.626 ** |
| Syringic acid | 1 | −0.350 ** | 0.190 | 0.447 ** | 0.159 | −0.486 ** | |
| 4-hydroxybenzoic acid | 1 | 0.653 ** | 0.387 ** | 0.118 | −0.481 ** | ||
| p-Coumaric acid | 1 | 0.270 * | 0.153 | −0.080 | |||
| Ferulic acid | 1 | 0.547 ** | −0.664 ** | ||||
| Protocatecuic acid | 1 | −0.296 * | |||||
| Gallic acid | 1 |