Table 2.
The peak area of differential root exudates in the rhizosphere of four Populus species.
| Differential root exudates | Mean value in each type of Populus | Pair-wise test (P-value) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| LM | XJ | HY | XY | LM vs. XJ | LM vs. HY | LM vs. XY | XJ vs. HY | XJ vs. XY | HY vs. XY | |
| Chrysin | 0.000 ± 0.000 | 1.250 ± 0.170 | 29.348 ± 20.686 | 362.294 ± 176.755 | 0.041 | 0.028 | 0.001 | 0.045 | 0 | 0.001 |
| Luvangetin | 8463.262 ± 791.139 | 4171.554 ± 161.516 | 11513.344 ± 750.233 | 23666.135 ± 1231.016 | 0 | 0.001 | 0 | 0 | 0 | 0 |
| Oleuropein | 17.356 ± 5.709 | 435.355 ± 22.632 | 79.344 ± 5.573 | 104.369 ± 9.892 | 0 | 0 | 0 | 0 | 0 | 0.011 |
| Salicylic acid | 213.105 ± 11.562 | 275.985 ± 40.937 | 458.952 ± 38.372 | 336.125 ± 1.119 | 0.006 | 0 | 0 | 0 | 0.013 | 0.004 |
| Strigol | 261.810 ± 26.201 | 1.558 ± 0.404 | 7.565 ± 0.481 | 3.890 ± 0.782 | 0 | 0 | 0 | 0 | 0.01 | 0 |
| Gentisic acid | 59.848 ± 2.256 | 23.370 ± 3.041 | 155.988 ± 24.740 | 277.597 ± 77.996 | 0 | 0.001 | 0 | 0 | 0 | 0.02 |
| Linoleic acid | 77.894 ± 10.874 | 29.017 ± 0.545 | 21.263 ± 2.651 | 14.891 ± 2.451 | 0 | 0 | 0 | 0.004 | 0 | 0.019 |
p < 0.05, fold change > 1.20; Populus species: LM (P. tomentosa), XJ (P. alba var. pyramidalis Bge.), HY (P. nigra), and XY (P. simonii Carr).