| ROS | reactive oxygen species |
| HR | highly resistant |
| HS | highly susceptible |
| SOD | superoxide dismutase |
| POD | peroxidase |
| JA | jasmonic acid |
| H2O2 | hydrogen peroxide |
| O2- | superoxide radicals |
| SI | severity index |
| HPI | hours post inoculation |
| SEM | scanning electron microscope |