Table 1.
Ring width, annual ring area, percentage of latewood, tracheid diameter (d), tracheid wall thickness (t), thickness-to-span ratio, tracheid density, hydraulic mean diameters (Dh) and theoretical hydraulic conductivity (Ktheor) measured for healthy (H) and desiccated (D) individuals in the last tree annual rings (2011–2013)
| Healthy | Desiccated | |||||
|---|---|---|---|---|---|---|
| 2011 | 2012 | 2013 | 2011 | 2012 | 2013 | |
| Ring width, mm | 0.29 ± 0.05 a | 0.20 ± 0.04 ab | 0.17 ± 0.03 b | 0.33 ± 0.06 a | 0.23 ± 0.08 ab | 0.15 ± 0.02 b |
| Ring area, mm2 | 4.6 ± 0.7 | 3.3 ± 0.9 | 2.9 ± 0.7 | 4.7 ± 0.8 | 4.2 ± 1.24 | 2.9 ± 0.7 |
| Late wood, % | 27.7 ± 4.4 | 24.1 ± 5.2 | 28.2 ± 4.9 | 27.6 ± 6.6 | 18.4 ± 2.8 | 28.8 ± 5.8 |
| Tracheid diameter, μm | 12.0 ± 0.4 | 12.4 ± 0.3 | 12.2 ± 0.3 | 12.4 ± 0.3 | 12.7 ± 0.3 | 12.1 ± 0.5 |
| Wall thickness, μm | 4.0 ± 0.3 | 3.8 ± 0.2 | 3.6 ± 0.2 | 3.7 ± 0.2 | 3.4 ± 0.4 | 3.7 ± 0.3 |
| (t/b)2 | 0.19 ± 0.03 A | 0.17 ± 0.01 A | 0.15 ± 0.02 A | 0.14 ± 0.03 B | 0.11 ± 0.02 B | 0.13 ± 0.01 B |
| Tracheid density, mm−2 | 3739 ± 83 | 3687 ± 231 | 3850 ± 293 | 3868 ± 49 | 3979 ± 106 | 3855 ± 275 |
| Dh (Kolb and Sperry, 1999), μm | 15.7 ± 0.6 | 16.3 ± 0.3 | 15.6 ± 0.4 | 17.1 ± 0.5 | 16.2 ± 0.7 | 15.8 ± 0.7 |
| Dh (Tyree and Zimmermann, 2002), μm | 13.2 ± 0.4 | 13.8 ± 0.2 | 13.1 ± 0.3 | 13.9 ± 0.3 | 13.6 ± 0.4 | 13.1 ± 0.4 |
| Ktheor, kg s−1 MPa−1 m−1 | 3.2 ± 0.2 | 3.7 ± 0.1 | 3.1 ± 0.1 | 4.0 ± 0.2 | 3.8 ± 0.3 | 3.2 ± 0.2 |
Values with significant differences are reported in bold. Mean ± SEM are reported. Upper-case letters indicate statistically significant difference (P < 0.05) between health classes (Factor I), while lower-case letters indicate statistically significant difference among years (Factor II), as tested using two-way ANOVA. No statistically significant interaction between factors was observed.