Table III.
Predicted distribution of iron among the different iron-chelate species in iron-deficient (−iron) and sufficient (+iron) apoplastic fluid and xylem sap
| Species | Apoplastic Fluid
|
Xylem Sap
|
||
|---|---|---|---|---|
| +Iron | −Iron | +Iron | −Iron | |
| [FeCitOH]−1 | 2.79 (49.9%) | 0.57 (23.8%) | 3.57 (66.2%) | 0.10 (4.2%) |
| [FeCit2]−3 | 2.59 (46.3%) | 1.81 (75.7%) | 1.40 (25.9%) | 2.30 (95.8%) |
| [Fe2Cit2(OH)2]−2 | 0.21 (3.7%) | 0.01 (0.4%) | 0.42 (7.8%) | <0.01 |
Chemical speciation was carried out with the MinteqA2 software. Data are in micromoles. Numbers in brackets are percentages of total iron.