Table I.

Kinematic and cell size data for adaxial and abaxial “between the vein” epidermal cells in half-grown first leaves of barley (±se; n = sample size)

Growth ParameterLeaf SurfaceWild TypeM489M489 +GA3
Blade elongation rate v (mm h−1)1.040.441.28
Final cell length lmax (mm) (n = 5–7)Adaxial0.252 ± 0.0030.229 ± 0.0070.242 ± 0.004
Abaxial1.40 ± 0.010.90 ± 0.031.51 ± 0.01
Cell flux (h−1)Adaxial4.131.925.29
Abaxial0.740.490.85
Cellochron (h)Adaxial0.240.520.19
Abaxial1.342.051.18
Mature cell perimeter (mm) (n = 5)Adaxial0.132 ± 0.0030.155 ± 0.0030.119 ± 0.002
Abaxial0.123 ± 0.0030.138 ± 0.0030.102 ± 0.002
Mature cell surface area (mm2)Adaxial0.0330.0350.029
Abaxial0.1720.1240.154