| Chl | chlorophyll |
| Fd | ferredoxin |
| LEF | photosynthetic linear electron flow |
| NPQ | non-photochemical quenching of chlorophyll fluorescence |
| PC | plastocyanin |
| pCO2 | partial pressure of CO2 |
| PSI | photosystem I |
| PSII | photosystem II |
| Y(II) | quantum yield of photochemical energy conversion in PSII |
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