| RWC | Relative water content |
| Ψm | Midday shoot water potential |
| ΦPSII | Effective photochemical efficiency |
| gs | Stomatal conductance |
| LAI | Leaf area index |
| LMA | Leaf mass area |
| LDMC | Leaf dry matter content |
| %N | Total nitrogen content |
| %C | Total carbon content |
| δ15N | Nitrogen isotope signature (15N/14N) |
| δ13C | Carbon isotope signature (13C/12C) |
| WUEi | Long-term intrinsic water-use efficiency |
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