Table 4.

Piecewise linear functions selected for wild-type lateral roots.

	Division zone				Elongation zone				Mature zone
	Slope	Correlation	No. cells	DZ-EZ limit	Slope	Correlation	No. cells	EZ-MZ limit	Slope	Correlation	No. cells	End position
A10	0.8	0.12 n.s.	132	855	59.5	0.88	67	1,494	49.6	0.78	68	2,990
A31	−6	−0.42	78	676	50.5	0.9	95	1,368	65.9	0.73	70	3,126
A9	−5.3	−0.35	94	587	42.4	0.91	61	1,219	43.1	0.76	67	3,557
A8	−3.2	−0.36 n.s.	17	553	59.2	0.83	34	1,100	49.4	0.77	37	2,459
A13	−3.6	−0.24	109	510	90.9	0.87	76	973	30.1	0.35	53	2,582
B33	−0.2	−0.01 n.s.	103	439	201.8	0.82	36	672	15.1	0.21 n.s.	59	2,198
B32	−16	−0.53	110	411	116.3	0.81	48	716	35.2	0.44	39	1,852
B19	11.6	0.42	30	366	118.8	0.85	31	600	21.2	0.36	36	2,283
A11	−6.3	−0.25 n.s.	55	328	83	0.9	77	655	74.6	0.72	50	1,898
A12	1.3	0.05 n.s.	49	320	102.5	0.91	44	722	13.3	0.33	77	2,967
B34	−9.6	−0.4	27	278	140.1	0.72	57	461	27.6	0.55	68	2,182
B20	1	0.02 n.s.	48	232	201.4	0.88	52	574	15.9	0.44	34	2,775
B35	−22.1	−0.32	44	215	183.3	0.76	44	388	3.2	0.09 n.s.	79	2,771
C25					159	0.75	18	144	30.6	0.82	110	1,961
C28					108.6	0.53	40	115	9.4	0.26	111	1,424
C26									28.1	0.82	133	2,115
C27									22.7	0.72	136	2,172
C30									27.6	0.69	170	2,214

For each lateral root (ordered in decreasing length of the division zone), the parameters of the piecewise linear function (slope × 1,000 in μm/mm, correlation coefficient for each zone –division zone (DZ), elongation zone (EZ) and mature zone (MZ), n.s. for non-significant−, limits between zones and position of the most shootward cell in μm) and the number of cells assigned to each zone are given.