Table 1.
Petiole xylem characteristics of the 10 temperate oak species, including hydraulically weighted mean vessel diameter (dh), vascular bundle diameter (D) and number of vessels (N), as well as the mean individual leaf area (area), LMA and SD. (The final column contains the scaling exponent of the power functions shown in figure 1. All of these properties varied significantly among species (ANOVA, p<0.05). n.d., not determined because leaves were hirsute.)
| code | species | dh (μm) | N (no. mm−2) | D (μm) | area (cm2) | LMA (g m−2) | SD (no. mm−2) | α values |
|---|---|---|---|---|---|---|---|---|
| 1 | Q. castaneifolia | 27.4 | 25.6 | 968 | 56 | 105 | 332 | 0.55 |
| 2 | Q. cerris | 25.5 | 51.8 | 711 | 26 | 87 | 515 | 0.59 |
| 3 | Q. georgiana | 22.4 | 51.5 | 670 | 22 | 74 | 752 | 0.58 |
| 4 | Q. ilex | 21.2 | 21.2 | 705 | 22 | 104 | n.d. | 0.73 |
| 5 | Q. nigra | 26.1 | 19.2 | 886 | 30 | 74 | 525 | 0.48 |
| 6 | Q. petraea | 28.2 | 27.4 | 1217 | 85 | 49 | 228 | 0.42 |
| 7 | Q. rhysophylla | 26.8 | 31.2 | 1505 | 74 | 110 | 761 | 0.47 |
| 8 | Q. robur | 25.5 | 30.0 | 1222 | 61 | 54 | 275 | 0.48 |
| 9 | Q. rubra | 34.0 | 30.4 | 1132 | 128 | 81 | 493 | 0.51 |
| 10 | Q. serrata | 30.6 | 36.6 | 847 | 59 | 74 | 653 | 0.60 |