Table II.

Concentrations of organic anions (μmol g⁻¹ fresh wt) in root tips from Fe-sufficient and Fe-deficient sugar beet

Organic Anion	+Fe (0–10 mm)	−Fe		−Fe YZ/+Fe	−Fe WZ/+Fe
		YZ	WZ
Malate	0.37 ± 0.05	5.95 ± 0.78	4.32 ± 0.80	16.1	11.7
Oxalacetate	<0.001	<0.001	<0.001	–	–
Citrate	0.10 ± 0.02	2.60 ± 0.54	2.70 ± 0.65	26.0	27.0
cis-Aconitate	0.030 ± 0.002	0.403 ± 0.140	0.040 ± 0.001	13.4	1.3
Isocitrate	<0.001	<0.001	<0.001	–	–
2-Oxoglutarate	0.020 ± 0.006	0.065 ± 0.016	0.020 ± 0.006	3.2	1.0
Succinatea	0.047	0.123	0.048	2.6	1.0
Fumarate	0.006 ± 0.001	0.800 ± 0.300	0.298 ± 0.040	133.3	49.7
Oxalate	7.71 ± 1.54	18.40 ± 4.50	19.60 ± 8.20	2.4	2.5
Ascorbate	0.23 ± 0.07	2.40 ± 0.37	2.55 ± 0.50	10.4	11.1
Pyruvate	<0.001	<0.001	<0.001	–	–
Total	8.47	30.62	29.53	3.6	3.5

Data are the mean ± se of 10 replicates.

^a Succinate co-eluted with an unidentified compound.