Table 1.

PME Activity in Transgenic Plants Overexpressing Hs CBP or PME3 and in the pme3 Knockout Mutant

Line	PME Activity (nmol H+/min/mg protein)	%	P Value
C24	341.3 ± 3.6	100
CBP overexpressing line (2-4)	367.7 ± 3.9	108	0.01900
Col-0	371.8 ± 1.9	100
pme3 knockout mutant	317.1 ± 6.0	85	0.04900
PME3 overexpressing line (3-4)	964.0 ± 7.6	259	0.00001

PME activity was measured in roots of 5-d-old plants. Data are presented as the mean ± se. Mean values significantly different from the wild-type controls were determined by paired t tests (P < 0.05).