Table 1.
Drought experiment 1 predawn (ψL_Predawn, MPa) and midday leaf water potential (ψL_Midday, MPa) for Chardonnay and Grenache vines used for cavitation analysis under well-watered (WW) and water-stressed (WS) conditions.
| Cultivar | WW ψL_Predawn | WW ψL_Midday | WS ψL_Predawn | WS ψL_Midday |
|---|---|---|---|---|
| Chardonnay | -0.26 ± 0.06a | -0.31 ± 0.01b | -1.17 ± 0.01c | -1.44 ± 0.01d |
| Grenache | -0.29 ± 0.10a | -0.34 ± 0.11b | -0.70 ± 0.09e | -1.05 ± 0.06f |
Plants were grown in control temperature glasshouses, watered to field capacity the evening prior to WW measurements being recorded and water withheld until wilting point. WS is reported after 96 h of water withheld. Leaf water potential was recorded continuously with psychrometers on the same plant as ultrasonic acoustic emissions (UAEs) were recorded. Mean values of three independent experiments ± SEM (n = 3) are shown. Superscript letters show significance between both cultivars and time of day (two-way ANOVA, Bonferroni post-test, p > 0.05).