. 2006 Jul;141(3):1138–1148. doi: 10.1104/pp.105.076240

Table II.

Effect of sulfate availability on Cd tolerance and accumulation in maize

Seedlings grown for 3 d in complete nutrient solutions were transferred and grown for an additional 72 h period in pregrowing solutions containing different sulfate concentrations (0, 0.2, and 2 mm). Plants were then exposed to 10 μm CdCl₂ for 48 h in the complete nutrient solution. Root SO₄²⁻ contents were evaluated at the end of the pregrowing period. Relative growth was calculated referring to the growth of control plants not exposed to CdCl₂. Values are means ± se of three experiments run in triplicate (n = 9). Different letters indicate significant differences (P < 0.05).

[SO₄²⁻]	Root SO₄²⁻ Content	Relative Growth		[Cd²⁺]		Total Cd²⁺ Removed
[SO₄²⁻]	Root SO₄²⁻ Content			Root	Shoot	Total Cd²⁺ Removed	Root	Shoot
mM	μmol g⁻¹ fresh weight	%		μmol g⁻¹ fresh weight		μmol plant⁻¹
0	0.57 ± 0.02^a	58.3 ± 1.6^a	48.0 ± 2.0^a	0.83 ± 0.03^a	0.31 ± 0.03^a	0.38 ± 0.01^a
0.2	2.56 ± 0.08^b	70.3 ± 2.0^b	69.4 ± 2.5^b	0.85 ± 0.05^a	0.33 ± 0.03^a	0.50 ± 0.02^b
2	3.40 ± 0.11^c	98.3 ± 4.0^c	97.1 ± 3.6^c	0.93 ± 0.04^a	0.36 ± 0.02^a	0.77 ± 0.02^c