Table 1. Intra-plant fractionation Δ30Si (‰) in rice seedlings for each Si supply (mM) and 30ε between the bulked plant δ30Siplant (‰) and the source δ30Sisource (‰).
| Δ30Si | 30ε | ||||||
|---|---|---|---|---|---|---|---|
| δ30Siaboveground | δ30Siroot | Δ30Siaboveground-root | δ30Siplant | δ30Sisource | δ30Sisolution | 30εplant-source | |
| ‰ | ‰ | ‰ ± σD | ‰ | ‰ | ‰ | ‰ ± σD | |
| 8.50 mM | -1.08 ± 0.04c | 0.19 ± 0.06a | -1.27 ± 0.10c | -1.03 ± 0.09c | 0.10 | 0.50 ± 0.04a | -1.13 ± 0.09c |
| 1.70 mM | -0.78 ± 0.15b | 0.15 ± 0.09ab | -0.94 ± 0.24b | -0.75 ± 0.07b | 0.10 | 0.35 ± 0.02b | -0.85 ± 0.07b |
| 0.17 mM | -0.31 ± 0.06a | 0.03 ± 0.08b | -0.34 ± 0.11a | -0.30 ± 0.05a | 0.10 | -0.36 ± 0.02c | -0.40 ± 0.05a |
| Average | -0.72 ± 0.05 | 0.12 ± 0.02 | -0.84 ± 0.07 | -0.69 ± 0.07 | 0.10 | 0.16 ± 0.03 | -0.79 ± 0.07 |
Data are expressed as means ± SD (n = 4). δ30Sisolution (‰) are expressed as the δ30Si values of nutrient solution after Si uptake by plants.