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