Table I.

Phytosiderophores poorly mobilize Cd from soil

Concentrations of Cd, Cu, and Zn (nanomoles per liter) in the filtrates of a soil naturally rich in heavy metals, after incubation with water, 50 μm DMA, or 50 μm DTPA solution. Values represent means ± sd. Significant differences are indicated for each element by different letters as determined by ANOVA followed by Tukey test (P < 0.05; n = 4).

Element	Water	DMA	DTPA
Cd	0.3 ± 0.0 b	1.2 ± 0.0 b	109.6 ± 3.4 a
Cu	22.1 ± 1.2 c	452.7 ± 5.8 a	264.8 ± 10.3 b
Zn	2.1 ± 2.1 c	389.2 ± 2.6 b	462.6 ± 17.2 a