Table 1. Contribution of the studied pine constitutive defensive traits and their inducibility to the defensive clustering of pine species.
Trait values (least square mean ± SE) for the two defensive clusters (syndromes) and coefficients for linear discriminant analyses (LDA scaling) are shown. Significant (P < 0.05) and marginal (P < 0.10) differences between clusters are typed in bold.
| Defensive trait | LDA scaling | Cluster A (n = 9) | Cluster B (n = 9) | P |
|---|---|---|---|---|
| Constitutive stem resin | 106.81 | 39.80 ± 6.82 | 17.50 ± 1.21 | 0.003 |
| Constitutive needle resin | -241.08 | 22.40 ± 2.25 | 17.30 ± 2.08 | 0.097 |
| Constitutive stem phenolics | 117.64 | 11.44 ± 0.56 | 11.95 ± 1.40 | 0.721 |
| Constitutive needle phenolics | -182.87 | 23.95 ± 4.45 | 22.97 ± 1.65 | 0.829 |
| JA-induced stem resin | 65.43 | 1.64 ± 2.35 | 1.82 ± 1.16 | 0.944 |
| JA-induced needle resin | 128.33 | -2.74 ± 2.08 | 5.59 ± 1.81 | 0.007 |
| JA-induced stem phenolics | -66.05 | -0.73 ± 1.10 | 0.42 ± 0.59 | 0.346 |
| JA-induced needle phenolics | 167.13 | -5.15 ± 2.25 | 7.35 ± 1.75 | <0.001 |
| SA-induced stem resin | 19.42 | -4.47 ± 2.26 | -0.45 ± 0.90 | 0.144 |
| SA-induced needle resin | 112.67 | -4.22 ± 1.05 | 2.16 ± 2.23 | 0.024 |
| SA-induced stem phenolics | -96.92 | 0.61 ± 1.68 | -2.70 ± 1.52 | 0.183 |
| SA-induced needle phenolics | NC1 | -4.34 ± 1.70 | 3.15 ± 2.50 | 0.030 |
1NC = not calculated due to high collinearity with other traits