Table 6.
Phenolic acids (μg/mL) in extracts and exudates from rice seedlings under stressed conditions.
| Sample | GA | PA | Ca | ChA | p-HA | VA | SyA | Vn | FA | SA | p-CA | BA | EA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| K10 (Ext) | - | - | - | - | - | - | - | 2.651 cde | - | - | - | 3.222 b | - |
| J10 (Ext) | - | - | - | - | - | - | - | 2.543 def | - | 1.269 b | - | 2.273 bc | - |
| K25 (Ext) | - | 0.684 a | - | - | - | - | - | 2.441 f | - | 1.160 b | - | - | - |
| J25 (Ext) | - | - | - | - | - | - | - | - | - | 1.443 b | 1.340 a | - | 2.101 b |
| K32 (Ext) | - | - | - | - | 0.572 ab | - | - | - | - | - | - | 2.206 bc | 1.665 b |
| J32 (Ext) | - | 0.658 c | - | - | 0.372 c | - | - | 2.733 bcd | - | 2.152 a | - | 3.388 b | - |
| K37 (Ext) | - | - | - | 6.969 a | - | - | - | - | 1.285 a | - | - | 1.046 c | 1.825 b |
| J37 (Ext) | - | - | - | - | - | - | - | 3.371 a | - | - | - | 5.347 a | - |
| K10 (Exu) | - | - | - | - | - | - | - | 2.907 b | - | - | - | 1.109 c | - |
| J10 (Exu) | - | - | - | - | - | - | - | 2.459 ef | - | - | 1.141 b | 3.102 b | - |
| K25 (Exu) | - | 0.674 b | - | - | - | - | - | 2.778 bc | - | - | - | - | - |
| J25 (Exu) | - | - | - | - | - | - | - | 2.832 bc | - | - | - | - | - |
| K32 (Exu) | - | - | - | - | 0.360 c | 0.045 a | 3.052 a | - | - | 1.309 b | - | 5.543 a | - |
| J32 (Exu) | - | - | - | - | 0.620 a | - | - | 2.536 def | - | - | - | 1.553 c | - |
| K37 (Exu) | - | - | 0.638 a | 5.912 c | 0.513 ab | - | - | 2.544 def | 1.198 a | - | - | - | 1.871 b |
| J37 (Exu) | 0.804 a | - | 0.379 b | 6.300 b | 0.455 bc | - | - | 2.351 f | 0.976 b | 2.374 a | - | - | 2.871 a |
Means within a column followed by the different letters are significantly different at p < 0.05. Ext: extracts; Exu: root exudates. GA: gallic acid, PA: protocatechuic acid, Ca: catechol, ChA: chlorogenic acid, p-HA: p-hydroxybenzoic acid, VA: vanillic acid, SyA: syringic acid, Vn: vanillin, FA: ferulic acid, SA: sinapic acid, p-CA: p-coumaric acid, BA: benzoic acid, EA: ellagic acid, -: not detected.