Table II.

Effect of NPA treatment of the petiole on leaf blade wt and surface area after 18 d After leaf blade length measurement shown in Figure 2, the plants were harvested, and the final wts of the blades were determined. Data for wet wt and surface area of the blade portion of monofoliate leaves are expressed as mean ± se. “Lanolin treated” and “NPA treated” refer to the leaf blades whose petioles were treated with lanolin and NPA (1% [w/w] in lanolin) respectively, whereas “lanolin untreated” and “NPA untreated” refer to the control leaves opposite treated leaves. Initial (d 0) leaf blade fresh wt and area for all leaf blades were estimated to be between 240 and 330 mg and from 14 to 19 cm².

Treatment	Final Leaf Blade Wt	Final Leaf Blade Area
	g	cm2
Lanolin-treated	1.065 ± 0.055	66.26 ± 3.14
Lanolin-untreated	1.187 ± 0.065	68.80 ± 3.57
NPA-treated	0.774 ± 0.045	44.72 ± 2.24
NPA-untreated	1.186 ± 0.048	72.45 ± 2.56