| A | Photosynthetic rate |
| A/E | Instantaneous water use efficiency |
| A/gs | Intrinsic water use efficiency |
| ABA | Abscisic acid |
| AM | Arbuscular mycorrhizal |
| E | Transpiration rate |
| gs | Stomatal conductance |
| ROS | Reactive oxygen species |
| θv | Volumetric soil water content |
| Ψleaf | Leaf water potential |
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