Table 1.
Differences in leaf vein traits among plant functional groups.
| Plant functional group | n | VD (mm mm-2) | VT (μm) | VV (mm3 mm-2×10-3) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Mean ± SD | CV | Mean ± SD | CV | Mean ± SD | CV | ||||
| All | 93 | 6.34 ± 2.18 | 0.34 | 30.11 ± 21.30 | 0.71 | 5.00 ± 5.66 | 1.13 | ||
| Growth form | |||||||||
| Tree | 41 | 6.70 ± 2.49 | 0.37 | 35.05 ± 28.78 | 0.82 | 6.56 ± 7.40a | 1.13 | ||
| Shrub | 52 | 6.05 ± 1.87 | 0.31 | 26.22 ± 11.58 | 0.44 | 3.76 ± 3.35b | 0.89 | ||
| P (Pphy.anova) | 0.351 (0.331) | 0.121 (0.334) | <0.001 (0.169) | ||||||
| Leaf type | |||||||||
| Needled-leaves | 3 | 3.10 ± 1.57a | 0.51 | 113.02 ± 63.03a | 0.56 | 26.72 ± 13.27a | 0.50 | ||
| Deciduous tree | 38 | 6.99 ± 2.33b | 0.33 | 28.89 ± 12.21b | 0.42 | 4.97 ± 3.76b | 0.76 | ||
| Deciduous shrub | 49 | 6.06 ± 1.91b | 0.32 | 25.82 ± 11.72b | 0.45 | 3.68 ± 3.41b | 0.93 | ||
| Evergreen shrub | 3 | 5.96 ± 1.19b | 0.20 | 32.75 ± 7.23b | 0.22 | 5.15 ± 1.93b | 0.38 | ||
| P (Pphy.anova) | <0.001 (0.266) | <0.001 (0.115) | <0.001 (0.219) | ||||||
VD, vein density; VT, vein thickness; VV, vein volume per area; n, species number; CV, coefficient variation.
P and Pphy.anova denote the P values to test the effect of plant functional groups on the each vein trait according to standard and phylogenetic one-way analyses of variance (ANOVA).
Trait values are mean value ± 1 SD (standard deviation). Statistical differences are denoted by different letters (P < 0.05).