Table I. Results of the kh curve fitting of six A. mono stems and six Populus 84K stems.
kmax is the maximum kh of the stem; cavitron PLC is the experimental PLC measured in a centrifuge; Sperry PLC is the PLC under atmospheric pressure predicted by the model; central PLC is the PLC at the central region of the stem predicted by the model; ERMS is the route mean square error of the curve fitting; Tform is the time used to induce embolism in the stem; and Trecovery is the total time used to measure the curve.
| Parameter | Stem 1 | Stem 2 | Stem 3 | Stem 4 | Stem 5 | Stem 6 |
|---|---|---|---|---|---|---|
| A. mono | ||||||
| kmax (E-5 kg m MPa−1 s−1) | 1.57 | 5.02 | 4.28 | 4.69 | 3.28 | 5.96 |
| Cavitron PLC (%) | 39.55 | 57.00 | 65.88 | 66.08 | 72.60 | 82.70 |
| Sperry PLC (%) | 0.76 | 4.47 | 13.57 | 7.80 | 6.45 | 9.04 |
| Central PLC (%) | 42.66 | 61.49 | 71.07 | 71.28 | 78.32 | 89.21 |
| Pb* (kPa) | 44.59 | 53.81 | 67.11 | 57.82 | 52.71 | 54.45 |
| ERMS (%) | 1.77 | 2.78 | 1.60 | 2.20 | 4.58 | 4.03 |
| Tform (h) | 0.41 | 0.41 | 0.22 | 0.36 | 0.82 | 0.35 |
| Trecovery (h) | 0.75 | 0.53 | 0.82 | 0.48 | 0.65 | 0.82 |
| Populus 84K | ||||||
| kmax (E-5 kg m MPa−1 s−1) | 5.25 | 8.07 | 7.07 | 9.13 | 8.95 | 5.68 |
| Cavitron PLC (%) | 51.59 | 43.62 | 51.31 | 58.64 | 39.49 | 39.32 |
| Sperry PLC (%) | 16.12 | 0.92 | 21.95 | 9.16 | 0.65 | 2.54 |
| Central PLC (%) | 55.65 | 47.05 | 55.35 | 63.26 | 42.60 | 42.41 |
| Pb* (kPa) | 57.76 | 72.45 | 34.45 | 37.25 | 77.44 | 38.48 |
| ERMS (%) | 1.72 | 1.82 | 2.06 | 2.18 | 2.48 | 2.59 |
| Tform (h) | 0.56 | 0.20 | 0.47 | 0.53 | 0.26 | 0.49 |
| Trecovery (h) | 0.77 | 0.33 | 0.48 | 0.82 | 0.27 | 0.29 |