TABLE 2.

Elongation rate, final cell length, and cell production rate of the primary root in the CK44 oxalate oxidase transgenic and wild-type lines at 48 or 72 h after transplanting to well-watered or water-stressed (−1.6 MPa) conditions, respectively.

	CK44, well-watered			CK44, water-stressed
	Wild-type	Transgenic	Change compared to wild-type (%)	Wild-type	Transgenic	Change compared to wild-type (%)
Root elongation rate (mm h–1)	2.03 ± 0.03	2.53 ± 0.05**	25	0.99 ± 0.02	0.70 ± 0.01**	−29
Final cell length (μm)	165 ± 2	173 ± 1*	5	111 ± 5	107 ± 6	−4
Cell production rate (cells h–1)	12.3 ± 0.2	14.6 ± 0.3**	19	8.9 ± 0.2	6.6 ± 0.4**	−26

Elongation rates were calculated for the preceding 12 h (well-watered) or 24 h (water-stressed) periods. Values are means ± SE of three to four roots. Asterisks denote significant differences between the transgenic and wild-type lines (t-test; * P < 0.05; ** P < 0.01).