Table 2.
Effect of moderate drought and infestation with Aculops lycopersici (TRM) on tomato plant defense proteins at 7 days post infestation (mean ± SE)
| Non-infested | TRM infestation | |||
|---|---|---|---|---|
| Control | Moderate drought | Control | Moderate drought | |
| Cathepsin B | 54 ± 2b | 47 ± 5b | 82 ± 2a | 86 ± 2a |
| Papain | 56 ± 3c | 57 ± 3c | 72 ± 4b | 83 ± 2a |
| Cathepsin D | 43 ± 1a | 39 ± 3a | 40 ± 4a | 35 ± 3a |
| Trypsin | 40 ± 4ab | 23 ± 5b | 50 ± 10a | 35 ± 6ab |
| Chymotrypsin | 91 ± 2a | 45 ± 12b | 95 ± 2a | 75 ± 8a |
| Aminopeptidase | 14 ± 3a | 10 ± 3a | 16 ± 4 | 19 ± 4 |
| Polyphenol oxidases1 | 5.2 ± 0.5a | 4.0 ± 0.6a | 7.8 ± 1.3b | 4.5 ± 0.4a |
| Peroxidases2 | 9.4 ± 2.4b | 3.9 ± 0.9c | 29.9 ± 6.4a | 12.1 ± 2.6b |
Means within a row followed by different letters are significantly different (Two-way ANOVA, Newman–Keuls post hoc test, p < 0.05)
1PPO: nmol Cathecol metabolized/mg protein * min
2POD: nmol Guaiacol metabolized/mg protein * min