Table 2.
Effect of exogenous GABA on MDA, proline, soluble sugar and electrolyte leakage in tomato seedlings under chilling stress
| Chilling stress | GABA concentration (μmolL−1) | MDA content (μmolg−1FW) | Proline content (μmolg−1FW) | Soluble sugar (mg g−1FW) | Electrolyte leakage (%) |
|---|---|---|---|---|---|
| – | Control | 5.3267 ± 1.2 a | 17.51 ± 3.5 a | 8.69 ± 0.46 a | 30.66 ± 3.51 a |
| + | 0 | 9.6867 ± 1.3 d | 86.15 ± 10.7 d | 22.15 ± 2.03 d | 73.66 ± 8.02 c |
| + | 100 | 8.6833 ± 0.92 cd | 53.66 ± 11c | 18.83 ± 1.30 c | 59.33 ± 1.52 b |
| + | 250 | 8.9000 ± 0.30 cd | 45.40 ± 4 c | 15.76 ± 1.16 b | 54.66 ± 3.78 b |
| + | 500 | 7.3867 ± 0.93 bc | 22.06 ± 3 ab | 10.60 ± 2.16 a | 35.66 ± 2.08 a |
| + | 750 | 6.5500 ± 0.47 ab | 32.00 ± 4 b | 11.23 ± 1.40 a | 33.00 ± 2.64 a |
| Significance | * | * | * | * | |
Mean values ± Standard Error (SE), Values in the column followed by the different letters (a, b,c and d) in the same column indicate significant difference (P < 0.05) according to Duncan’s Multiple Range Test analysis. Combined letters (ab, cd and bc) in the same column indicate that rows with similar letters are not significant (P < 0.05)
(*): Significance at 0.05 levels
(−): not chilling treated seedlings, (+): chilling treated seedlings