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Changes in Membrane Potential Resulting from Changes in Na+ Concentrations in the Wild Type, tss1, and tss2a
| Extracellular Na+ Concentration (mM) |
Wild Type (Vm) | tss1 (Vm) | tss2 (Vm) |
|---|---|---|---|
| 0.5 | 8 ± 2 | 7 ± 2 | 9 ± 3 |
| 1 | 9 ± 3 | 8 ± 3 | 7 ± 2 |
| 10 | 22 ± 4 | 21 ± 2 | 24 ± 3 |
a Vm measured in apical root hairs sequentially bathed in flowing medium containing 0.5, 1, and 10 mM Na+. Values are averages ±sd of three assays in three independent plants (n = 9).
