Table 3.
Amounts of iron plaque on different root zones (base, middle, and tip) for the four genotypes with low and high rates of total ROL grown in three different aerated conditions (aerated, normal, and stagnant nutrient solutions) for 30 d and then subjected to 30 mg l−1 Fe for 12 h
| Fe concentration in plaque (g kg−1) |
||||
| Genotype | Condition | Root base | Root middle | Root tip |
| IAPAR 9 | Aerated | 8.0±1.4 | 7.1±0.38 | 7.7±1.5 |
| Normal | 3.6±0.7 | 5.6±2.1 | 9.6±1.7 | |
| Stagnant | 4.6±0.8 | 6.4±2.1 | 29.0±20 | |
| Nanyangzhan | Aerated | 7.5±1.5 | 6.5±1.8 | 7.1±0.5 |
| Normal | 3.8±0.8 | 4.8±1.0 | 7.61±1.3 | |
| Stagnant | 5.6±1.2 | 7.0±0.4 | 22.8±5.4 | |
| TD71 | Aerated | 9.1±0.9 | 7.5±0.3 | 6.3±0.5 |
| Normal | 6.4±1.5 | 8.6±2.8 | 17.0±4.5 | |
| Stagnant | 10.0±4.3 | 26.0±7.0 | 32.0±7.6 | |
| TORO 2 | Aerated | 8.4±0.7 | 6.9±1.2 | 5.8±0.5 |
| Normal | 5.2±1.2 | 7.2±0.6 | 13.9±4.6 | |
| Stagnant | 8.3±2.5 | 22.1±5.5 | 26.2±7.2 | |
| Analysis of variance: | ||||
| Genotype (G) | P <0.01 | |||
| Zone (Z) | P <0.001 | |||
| Treatment (T) | P <0.001 | |||
| G×Z | NS | |||
| G×T | NS | |||
| Z×T | P <0.001 | |||
| G×T×Z | NS | |||
Results were analysed by a three-way ANOVA. NS, not significant.