Table I. As(V) reduction capacity of the Arabidopsis wild type and cad1-3 and cad2-1 mutants.

Plants were exposed to 5 μm As(V) for 24 h and As speciation determined. Data are means ± se (n = 4). Means followed by different letters are significantly (P < 0.05, lsd test) from each other.

	% As(III)
	Roots	Shoots
Wild type	96.3 ± 0.6 a	100.0 ± 0.0 a
cad1-3	91.7 ± 1.4 a	96.7 ± 1.2 b
cad2-1	84.5 ± 2.3 b	95.3 ± 0.3 b