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 Parameter	Leaf Surface	Wild Type	M489	M489 + GA3
Blade elongation rate v (mm h−1)		1.04	0.44	1.28
Final cell length lmax (mm) (n = 5–7)	Adaxial	0.252 ± 0.003	0.229 ± 0.007	0.242 ± 0.004
	Abaxial	1.40 ± 0.01	0.90 ± 0.03	1.51 ± 0.01
Cell flux (h−1)	Adaxial	4.13	1.92	5.29
	Abaxial	0.74	0.49	0.85
Cellochron (h)	Adaxial	0.24	0.52	0.19
	Abaxial	1.34	2.05	1.18
Mature cell perimeter (mm) (n = 5)	Adaxial	0.132 ± 0.003	0.155 ± 0.003	0.119 ± 0.002
	Abaxial	0.123 ± 0.003	0.138 ± 0.003	0.102 ± 0.002
Mature cell surface area (mm2)	Adaxial	0.033	0.035	0.029
	Abaxial	0.172	0.124	0.154