Cultivars | Thickness (μm) | Stomatal density (mm−2) | ||||
Leaf blade | Upper epidermis | Lower epidermis | Palisade parenchyma | Spongy parenchyma | ||
Honeycrisp | 292.2 ± 14.6 a | 1.47 ± 0.002 a | 9.7 ± 0.001 a | 140.1 ± 0.009 a | 127 ± 0.135 a | 4.46 ± 0.28 a |
Yanfu-3 | 218.6 ± 15.6 b | 1.59 ± 0.002 a | 8.4 ± 0.001 a | 97.5 ± 0.003 b | 96 ± 0.101 b | 3.89 ± 0.15 b |