| APX | ascorbate peroxidase |
| ATP | adenosine triphosphate |
| CAT | catalase |
| Ci | intercellular CO2 concentration |
| C:N | carbon-to-nitrogen ratio |
| CO2 | carbon dioxide |
| Fe(III) | ferric iron ion |
| Gs | stomatal conductance |
| H+-ATPase | membrane-bound proton ATPase |
| IAS | International Allelopathy Society |
| IAA oxidase | indole-3-acetic acid oxidase |
| MDA | malondialdehyde |
| NADPH | nicotinamide adenine dinucleotide phosphate (reduced form) |
| NH4+ | ammonium ion |
| NO3− | nitrate ion |
| Pn | net photosynthesis |
| PAL | phenylalanine ammonia-lyase |
| POD | peroxidase |
| PRISMA | Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension |
| PSI | photosystem I |
| PSII | photosystem II |
| ROS | reactive oxygen species |
| SOD | superoxide dismutase |
| Tr | transpiration rate |
| VOCs | volatile organic compounds |
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