Table I.
Summary of Rroot, Rsi, and Ri
| Root or Node No. | Rsi | Ri |
|---|---|---|
| × 10−3 MPa s−1 kg−1 | ||
| Root + node 1 | 29 ± 9 | |
| Node 2 | 1.67 ± 0.15 | 5.94 ± 1.4 |
| Node 3 | 2.06 ± 0.26 | 8.36 ± 2.1 |
| Node 4 | 2.92 ± 0.42 | 4.9 ± 2.0 |
| Node 5 | 5.4 ± 1.9 | 5.5 ± 1.5 |
| Node 6 | 6.7 ± 1.6 | 7.1 ± 2.2 |
| Node 7 | 6.7 ± 1.6 | 4.0 ± 2.2 |
| Node 8 | 6.56 ± 0.72 | 13.8 ± 7.2 |
| Node 9 | [7.5] | [15] |
| Node 10 | [8.5] | [20] |
Maize plants had 10 nodes numbered from 1 (base) to 10 (apex). Rroot includes node 1 because the HPFM could not be sealed to the root below node 1. Resistances for nodes 9 and 10 could not be measured because the tissue was too soft to mount on the HPFM connector, but the values used for modeling purposes are given in square brackets. All values are given as means ± se; n = 6.