Table 1.

Effect of increasing NaCl concentrations on the content of cations and anions in zones I and II of Brassica oleraceae roots

Days of treatment	Cations (mmol g DW−1)				Anions (mM)
	Na+	K+	Ca2+	Mg2+	Cl−	SO42−	PO43−	NO3−
Zone I
1 d	0	0.06d	1.66b	0.09b,c	8.9e	8.9e	0.06d	62.3a	20.4a,b
	40	1.35c	1.22b	0.12b,c	21.7d	21.7d	0.12c	61.3a	20.8a,b
	80	3.54a,b	0.98b	0.14b,c	72.0a	72.0a	0.20b	66.4a	11.4a,b
7 d	0	0.06d	2.16a	0.22a	8.7e	8.7e	0.05d	47.9b	22.3a,b
	40	2.69b	0.89b	0.11b,c	37.6c	37.6c	0.15c	46.2b	22.6a
	80	3.21a,b	0.55b	0.12b,c	55.0b	55.0b	0.23b	48.2b	21.4a,b
14 d	0	0.06d	4.22a	0.16a,b	3.5f	3.5f	0.14c	16.7c	22.9a
	40	2.49b,c	1.30b	0.08b,c	18.2d	18.2d	0.35a	17.6c	21.1a,b
	80	4.39a	0.92b	0.08c	38.5c	38.5c	0.34a	19.6c	22.0a,b
Zone II
1 d	0	0.06d	1.41b,c,d	0.14a,b,c	15.9d,e	15.9d,e	0.18c	68.5a	32.3a
	40	1.70b,c	1.39b,cd	0.15a,b,c	16.8d,e	16.8d,e	0.03d	71.6a	29.3b
	80	3.35a	1.38b,c,d	0.14a,b,c	57.2b	57.2b	0.03d	45.3b	25.1c
7 d	0	0.09d	1.58b,c	0.22a	11.7e	11.7e	0.14c	50.2b	24.2c
	40	2.60a,b	0.81d,e	0.13b,c	42.6c	42.6c	0.10c	48.7b	33.8a
	80	3.56a	0.47e	0.15a,b,c	89.7a	89.7a	0.35b	48.2b	33.5a
14 d	0	0.06c,d	1.98a,b	0.17a,b	3.1f	3.1f	0.28b	28.9c	32.8a
	40	3.59a	1.06c,d,e	0.08b,c	23.6d	23.6d	0.52a	25.4c,d	28.7b
	80	3.65a	0.74e	0.07c	42.9c	42.9c	0.84a	22.6d	25.8c

Values represent the means ±SD of five different samples. Means within a column without a common letter are significantly different by Tukey's test (P <0.05)