| CF | Chlorophyll Fluorescence |
| SPAD | Soil Plant Analysis Development |
| Ht | Plant Height |
| D | Stem Diameter |
| HII | Heat Injury Index |
| Ci | Intercellular CO2 Concentration |
| E | Transpiration Rate |
| gs | Stomatal Conductance |
| Fo | Initial Chlorophyll Fluorescence |
| Fm | Maximum Chlorophyll Fluorescence |
| Pn | Net Photosynthetic Rate |
| EL | Electrolyte Leakage |
| LT | Leaf Temperature |
| WUEinst | Instantaneous Water Use Efficiency |
| WUEintr | Intrinsic Water Use Efficiency |
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