| SOD | Superoxide dismutase |
| CAT | Catalase from micrococcus lysodeiktic |
| POD | Peroxidase |
| DEGS | Differential expression genes |
| DTZ | Distal transition zone of the root |
| ROS | Reactive oxygen species |
| PR | Primary root |
| Xylan endoglucanase/hydrolase | XTH |
| Xylan endoglucanase | XET |
| PME | Pectin methyl esterase |
| PAL | Phenylalanine ammonia-lyase |
| 4CL | 4-coumarate: coa ligase |
| CCR | Cinnamoyl-coa reductase |
| COMT | Caffeic acid o-methyltransferase |
| CAD | Cinnamyl alcohol dehydrogenase |
| KEGG | Kyoto Encyclopedia of Genes and Genomes |