Table 1.
Terms used in the analysis of the OJIP fluorescence transient
| Symbol | Description |
|---|---|
| PIABS | The performance of the photosynthesis apparatus expressed in relation to absorption. Accounts for the density of reaction centers, the quantum yield of primary photochemistry, and the ability to transfer electrons from PSII to PSI |
| TRo/RC | Energy capture by one reactive center |
| ETo/RC | Rate of the energy transfer by one reactive center |
| ABS/RC | The effective antenna size expressed as absorbance per reaction center |
| DIo/RC | The amount of energy dissipated per active reaction center |
| Area | It is proportional to the concentration of electron acceptor pool size of PSII that includes QA, QB, and PQ |
| QA | Primary quinone-type electron acceptors of PSII |
| QB | Secondary quinone-type electron acceptors of PSII |
| PQ | Plastoquinone-a quinone electron transporter |
| ϕEo (ETo/ABS) | The probability that an absorbed photon will move an electron into the electron transport chain |
| ϕPo (TRo/ABS) | The maximal yield of primary photochemistry. When calculated from extreme values (Fo and Fm) Fv/Fm |
| Fo | Fluorescence emitted when all reaction centers are open |
| Fm | Fluorescence emitted when all reaction centers are closed |
| Fv/Fm | Current photochemical capacity of PSII |
| Ѱ0 (ETo/TRo) | Quantum yield of electron transport |