TABLE 4.
SPAD increment (SPAD index after Fe resupply-SPAD index before Fe resupply) and 57Fe content (μg/organ) of the old leaves at the 3-day resupply stage under different Si treatments [Si applied to root (+SiR), leaves (+SiF), and no Si (−Si) application].
| +SiR | +SiF | (−Si) | |
| SPAD increment after Fe resupply | |||
| +Fe | 1.7 ± 0.2b | 5.5 ± 1.5a | 8.1 ± 2.0a |
| (−Fe)+Fe | 6.5 ± 1.6b | 11.7 ± 3.0a | 0.7 ± 0.2c |
| 57Fe content in old leaves (μg/organ) | |||
| (−Fe)+Fe | 11.7 ± 4.2ab | 19.6 ± 4.37a | 8.6 ± 3.30b |
The data are the mean ± SE (n = 3). Different letters in the same column showed significant differences according to Duncan’s test (p < 0.05).