Table 4.

Effect of NaCl on total protein, T.P. (mg g⁻¹ dry matter) and superoxide dismutase (SOD) (Units * mg⁻¹ T.P.) activity of wheat leaves at different growth stages in the presence and absence of silicon.

Treatment		Seedling Stage		Tillering Stage		Booting Stage		Milky Stage
NaCl mM	Si mM	T.P.	SOD	T.P.	SOD	T.P.	SOD	T.P.	SOD
0	0	87.1± 7.3	0.81± 0.06	102.9 ± 8.6	3.34± 0.24	127.9±10.7	6.09± 0.44	136.3 ± 11.4	2.50±0.18
60	0	58.2 ± 6.5	3.43 ± 0.38	83.2±9.2	5.62± 0.62	99.1 ± 11.0	8.11± 0.90	102.1 ± 11.3	4.43 ± 0.49
90	0	40.0 ± 4.0	5.05 ± 0.42	60.9 ± 6.1	9.25 ± 0.77	74.1 ± 7.4	13.0 ± 1.15	83.1 ± 8.3	11.65 ± 0.97
120	0	115.0 ± 8.2	7.21 ± 0.56	133.8 ±9.6	8.45 ± 0.65	148.5 ± 10.6	16.90 ± 1.30	154.4 ± 11.0	17.21 ± 1.32
0	0.78	97.0 ± 10.8	0.84 ± 0.08	128.1 ± 14.2	3.03 ± 0.09	136.9 ± 15.2	5.44 ± 0.22	148.1 ± 16.5	1.91 ± 0.08
60	0.78	69.6 ± 8.0	6.21 ± 0.52	94.1 ± 7.8	8.81 ± 0.73	110.1 ± 9.2	10.31 ± 0.86	113.3 ± 9.4	9.85 ± 0.82
90	0.78	51.1 ± 3.9	7.85 ± 0.87	75.2 ±5.8	13.65 ± 1.52	83.6 ± 6.4	18.09 ± 2.01	87.4± 6.7	20.41 ± 2.27
120	0.78	91.2 ± 8.3	9.47 ± 0.95	116.5 ± 10.6	19.77 ± 1.98	139.7 ± 12.7	22.24 ± 2.22	143.2 ± 13.0	27.97 ± 2.80
LSD 0.05		-	2.02	-	2.62	-	4.91	-	6.88

T.P. = Total protein, * = See Materials and Methods.