Table I.
Leaf water deficit, stomatal conductance, net CO2 assimilation at 360 ppm CO2, and light- and CO2-saturated rate of gross oxygen evolution for control leaves, chilled leaves in CL treatment, and water-stressed leaves
| Species and cv | Water Deficit
|
Stomatal Conductance
|
Net CO2 Assimilation
|
Saturated Rate of Gross O2
|
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cont. | Cold stress | Water stress | Cont. | Cold stress | Water stress | Cont. | Cold stress | Water stress | Cont. | Cold stress | Water stress | |
| % | mmol m−2 s−1 | μmol m−2 s−1 | μmol m−2 s−1 | |||||||||
| V. riparia | 5.2 (0.8) | 6.3 (0.8) | 16.2 (0.4) | 0.117 (0.016) | 0.037 (0.011) | 0.0001 (0.0022) | 8.3 (0.5) | 2.4 (0.8) | −1.2 (0.9) | 21.7 (1.6) | 4.0 (0.1) | 4.1 (*) |
| V. vinifera cv Gordot | 1.7 (0.6) | 16.3 (3.7) | 6.7 (1.0) | 0.111 (0.023) | 0.016 (0.006) | 0.0028 (0.0004) | 5.9 (0.8) | −0.05 (0.40) | 0.6 (0.1) | 22.1 (0.4) | 7.5 (0.1) | 11.4 (1.4) |
| V. vinifera cv Riestling | 2.9 (0.8) | 5.0 (0.4) | 8.9 (1.7) | 0.312 (0.032) | 0.070 (0.001) | 0.046 (0.010) | 10.4 (0.9) | 6.2 (0.3) | 4.2 (0.9) | 18.3 (1.5) | 10.9 (1.1) | 14.6 (0.9) |
| V. vinifera cv Chardonnay | 3.5 (1.6) | 21.3 (1.3) | 6.7 (1.0) | 0.342 (0.166) | 0.035 (0.003) | 0.0031 (0.0005) | 11.4 (2.0) | 0.5 (0.4) | 0.3 (0.1) | 27.3 (2.7) | 17.4 (1.1) | 3.8 (0.8) |
Means of three to five replicates ± se (in parentheses).