Table 3.
Pearson’s correlation between wood color parameters and extractives content in V. guatemalensis (upper diagonal) and A. mangium (lower diagonal), considering sapwood and heartwood samples together.
| Parameters | L* | a* | b* | Extractives in hot water | Extractives in ethanol-toluene | Total extractives yield | Phenols in hot water | Phenols in ethanol-toluene | Total phenol content |
|---|---|---|---|---|---|---|---|---|---|
| L* | 1 | −0.71 ** | −0.51 ** | 0.05 NS | −0.53 ** | −0.13 NS | −0.15 NS | 0.15 NS | −0.11 NS |
| a* | −0.92 ** | 1 | 0.64 ** | 0.25 NS | 0.76 ** | 0.48 * | 0.02 NS | 0.14 NS | 0.06 NS |
| b* | 0.12 NS | −0.05 NS | 1 | 0.04 NS | 0.70 ** | 0.26 NS | −0.04 NS | 0.01 NS | −0.03 NS |
| Extractives in hot water | −0.68 ** | 0.71 ** | 0.18 NS | 1 | 0.68 ** | 0.95 ** | 0.01 NS | 0.48 ** | 0.13 NS |
| Extractives in ethanol-toluene | −0.82 ** | 0.81 ** | −0.14 NS | 0.68 ** | 1 | 0.47 ** | −0.14 NS | 0.12 NS | −0.10 NS |
| Total extractives yield | −0.80 ** | 0.82 ** | 0.05 NS | 0.94 ** | 0.68 ** | 1 | −0.0 NS | 0.47 ** | 0.08 NS |
| Phenols in hot water | −0.69 ** | 0.60 ** | −0.24 NS | 0.37 * | 0.69 ** | 0.55 ** | 1 | 0.17 NS | 0.97 ** |
| Phenols in ethanol-toluene | −0.82 ** | 0.69 ** | 0.05 NS | 0.57 ** | 0.53 ** | 0.61 ** | 0.46 ** | 1 | 0.40 * |
| Total phenol content | −0.72 ** | 0.62 ** | −0.28 NS | 0.39 ** | 0.70 ** | 0.57 ** | 0.91 ** | 0.51 ** | 1 |
Legend: ** statistically significant at the 99% confidence level; * statistically significant at the 95% confidence level.