Table 1.

Elemental Analysis of Shoots and Roots of Wild-Type and nramp1-1 Plants (μg/g Dry Weight)

			Mn		Fe		Co		Zn		Cu
Condition	Genotype	Tissue	Mean	sd	Mean	sd	Mean	sd	Mean	sd	Mean	sd
Standard	wild type	shoot	418	22	100	2	0.66	0.04	368	15	6.6	0.2
	nramp1-1		447	25	103	2	0.68	0.08	367	29	6.8	0.2
	wild type	root	290	39	446	86	2.87	0.32	1904	282	13.3	2.1
	nramp1-1		126	49	680	170	1.73	0.49	1293	236	18.3	6.7
0 Mn	wild type	shoot	13	1	116	7	0.26	0.01	247	15	6.8	0.6
	nramp1-1		4	0	130	19	0.16	0.01	204	32	9.3	0.6
	wild type	root	6	2	1620	202	0.45	0.07	640	185	11.8	2.3
	nramp1-1		5	2	1836	49	0.42	0.13	1361	686	28.0	11.3

ICP-MS measurement of roots and shoots of wild-type or nramp1-1 plants grown for 2 weeks in vitro either in standard Mn (20 μM MnSO₄) or in Mn-free (no added Mn) medium as indicated (n = 5). Significant changes between the wild type and mutant are indicated in bold.