TABLE 1.
Effect of chilling injury on electrolyte leakage from leaves, leaf-free proline, total phenolics, and starch content of grapevine plantletsa
Treatment | Electrolyte leakageb (%) | Free proline (μmoles g−1 FW)
|
Total phenols (nanogram g−1 FW) | Starch content (mg/g of FW)
|
||||
---|---|---|---|---|---|---|---|---|
Shoots | Leaves | Roots | Shoots | Leaves | Roots | |||
Control at 26°C | 13.00 a | 0.95 a | 2.85 a | ND a | 13.11 a | 0.005 a | 0.010 a | 0.010 a |
Control at 4°C | 39.00 b | 1.89 b | 5.75 b | 0.09 a | 14.51 b | 0.005 a | 0.010 a | 0.002 a |
Bacterized at 26°C | 14.00 a | 1.24 c | 3.5 c | 0.15 b | 19.85 c | 0.060 b | 0.050 b | 0.004 a |
Bacterized at 4°C | 19.95 c | 2.19 d | 6.45 d | 0.18 b | 21.55 d | 0.050 c | 0.080 c | 0.002 a |
Values correspond to the mean obtained with 24 plantlets for each replicate. Three replicates were performed per treatment. In each row, the values represented by the same lowercase letters were not significantly different at a P value of <0.05 (Fisher's protected LSD test). ND, not detected.
Expressed as percentage of total electrolyte content.