Table 3.
Comparison of phenolic concentrations in the tree PRA-R with mean values of the more susceptible trees for constitutive levels at the beginning of July, and infection-induced concentration changes in mid-July and August.
| Concentration beginning July (μmol g−1) | Inf.-ind. conc. changes mid-July (μmol g−1) | Inf.-ind. conc. changes August (μmol g−1) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Analyzed population | PRA-R | Correlation with inf. degree | Analyzed population | PRA-R | Correlation with inf. degree | Analyzed population | PRA-R | Correlation with inf. degree | |
| Trans-Astringin | 0.50 ± 0.14 | 0.21 | 0.36 | −1.02 ± 0.40 | +0.37 | −0.07 | −6.72 ± 2.55 | +9.24 | −0.88 |
| Trans-Isorhapontin | 0.14 ± 0.04 | 0.07 | 0.32 | −0.55 ± 0.18 | −0.17 | 0.03 | −1.05 ± 0.37 | +0.13 | −0.77 |
| Trans-Piceid | 0.01 ± 0.00 | 0.00 | 0.25 | −0.02 ± 0.02 | +0.14 | −0.59 | −0.01 ± 0.08 | +0.42 | −0.79 |
| Trans-Piceatannol | 0.00 ± 0.00 | 0.01 | −0.36 | −0.11 ± 0.04 | +0.68 | −0.78 | +0.12 ± 0.06 | +0.62 | −0.43 |
| Trans-Resveratrol | 0.01 ± 0.00 | 0.01 | −0.29 | −0.01 ± 0.01 | +0.08 | −0.85 | +0.06 ± 0.02 | +0.10 | −0.25 |
| Kaempferol 3-glucoside | 3.46 ± 0.85 | 5.54 | −0.57 | +0.70 ± 0.11 | +0.14 | 0.25 | +0.44 ± 0.06 | +0.29 | 0.45 |
| Kaempferol 7-glucoside | 0.08 ± 0.01 | 0.10 | −0.45 | +0.02 ± 0.01 | 0.00 | 0.11 | +0.01 ± 0.01 | −0.00 | 0.41 |
| Kaempferol 3-rutinoside | 0.67 ± 0.10 | 0.98 | −0.40 | −0.03 ± 0.03 | 0.00 | −0.36 | −0.03 ± 0.02 | +0.04 | −0.19 |
| Kaempferol | 1.14 ± 0.55 | 5.16 | −0.66 | −0.00 ± 0.01 | +0.40 | −0.94 | +0.06 ± 0.01 | +0.07 | −0.08 |
| Quercetin 3-glucoside | 1.67 ± 0.31 | 2.26 | −0.41 | +0.30 ± 0.08 | −0.01 | 0.12 | +0.18 ± 0.04 | +0.09 | 0.24 |
| Quercetin | 0.19 ± 0.07 | 0.99 | −0.77 | −0.00 ± 0.00 | +0.06 | −0.92 | +0.01 ± 0.00 | +0.02 | −0.19 |
| Taxifolin | 0.08 ± 0.01 | 0.24 | −0.88 | −0.07 ± 0.06 | +0.95 | −0.76 | +0.27 ± 0.06 | +0.55 | 0.00 |
| Gallocatechin | 3.49 ± 0.34 | 1.94 | 0.30 | +0.67 ± 0.23 | +0.76 | 0.35 | −0.11 ± 0.30 | +2.61 | −0.18 |
| Catechin | 13.88 ± 1.14 | 15.01 | −0.26 | +2.88 ± 2.14 | +9.58 | −0.18 | +3.88 ± 1.71 | +21.36 | −0.18 |
| Picein | 1.88 ± 0.44 | 0.63 | 0.14 | −4.36 ± 1.19 | −3.27 | 0.52 | −25.63 ± 6.89 | −2.48 | −0.82 |
| Shikimic acid | 99.76 ± 4.00 | 71.12 | 0.45 | −59.79 ± 4.77 | −45.49 | 0.27 | −149.57 ± 13.70 | 10.99 | −0.59 |
Infection-induced concentration changes (Inf.-ind. conc. changes) reflect the deviation of compound levels in infected needles from concentrations in healthy needles of the same tree and sampling date (for details see Section Materials and Methods). Also given are the Pearson-correlation-coefficients between compound concentrations and the mean infection degree including all trees (n = 10). Concentrations of the tree PRA-R outside the confidence interval of the analyzed population and significant correlations (p ≤ 0.05) are marked in bold.