| 3,4-DHP | 3,4-dehydro-L-proline |
| AGPs | Arabinogalactan proteins |
| EXTs | Extensins |
| HRGPs | Hydroxyproline-rich glycoproteins |
| PBS | Phosphate-buffered saline |
| PCD | Programmed cell death |
| RT-qPCR | Quantitative reverse transcription PCR |
| TEM | Transmission Electron Microscopy |
| TUNEL | Terminal deoxynucleotidyl transferase dUTP nick end labelling |