| N | Nitrogen |
| BNF | Biological nitrogen fixation |
| C | Carbon |
| ABA | Abscisic acid |
| RWC | Relative water content |
| A | Photosynthetic rates |
| E | Transpiration |
| gs | Stomatal conductance |
| Ci | Substomatic CO2 concentration |
| SA | Salicylic acid |
| JA | Jasmonic acid |
| Z | Trans-zeatin |
| ZR | Trans-zeatin riboside |
| IAA | Indole-3-acetic acid |
| GA1 | Gibberellin 1 |
| GA4 | Gibberellin 4 |
| IPA | Isopentenyl adenosine |
| 2iP | Isopentenyl adenine |
| DW | Dry weight |
| ∆13C | Carbon isotope discrimination |
| Δ18O | Oxygen isotope ratio |
| WUE | Water use efficiency |
| SS | Sucrose synthase |
| ROS | Reactive oxygen species |
| GABA | Gamma-aminobutyric acid |
| Asn | Asparagine |
| Asp | Aspartic acid |
| Glu | Glutamic acid |
| Pro | Proline |
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