Table 4.
Trichome density and stomatal density of cauline leaves and post- and pre-cold rosette leaves of Arabidopsis halleri subsp. gemmifera plants grown in growth chambers. Seeds were derived from two habitat types [understorey (430 and 580 m) and semi-alpine (1220 and 1370 m)]. Average ± s.e. (n = 36) for adaxial (AD) and abaxial (AB) surfaces are given. For explanation of two-way ANOVAs used see the caption of Table 3. For trichome density, surface effects were evaluated by one-way ANOVAs for plants from the semi-alpine habitat
| Traits Leaf type |
Surface | Habitat | Two-way ANOVA | |||
|---|---|---|---|---|---|---|
| Understorey | Semi-alpine | Habitat | Surface | Interaction | ||
| (A) Trichome density (mm−2) | ||||||
| Cauline leaf | AD | 0.0 ± 0 | 25.6 ± 1.6 | |||
| AB | 0.0 ± 0 | 33.8 ± 2.3 | – | 9.03** | – | |
| Post-cold rosette leaf | AD | 0.0 ± 0 | 17.7 ± 0.8 | |||
| AB | 0.0 ± 0 | 19.9 ± 1.1 | – | 2.49ns | – | |
| Pre-cold rosette leaf | AD | 0.0 ± 0 | 16.7 ± 0.3 | |||
| AB | 0.0 ± 0 | 16.8 ± 0.9 | – | 0.006ns | – | |
| (B) Stomatal density (mm−2) | ||||||
| Cauline leaf | AD | 89.3 ± 3.5 | 105.2 ± 3.6 | |||
| AB | 101.6 ± 3.2 | 103.7 ± 3.0 | 7.20** | 2.62ns | 4.25* | |
| Post-cold rosette leaf | AD | 94.2 ± 3.0 | 87.7 ± 4.2 | |||
| AB | 101.0 ± 3.1 | 94.5 ± 3.2 | 3.57ns | 3.91ns | 0.00ns | |
| Pre-cold rosette leaf | AD | 45.6 ± 2.3 | 55.6 ± 3.3 | |||
| AB | 74.5 ± 2.8 | 68.3 ± 2.7 | 0.44ns | 56.43*** | 8.49** | |
AD, adaxial; AB, abaxial.
*P < 0.05; **P < 0.01; ***P < 0.001; ns, not significant at P < 0.05.