Table 2.
Quantifying PSII performance parameters obtained from the JIP-test based on the Chl a fluorescence transients
| Extracted and technical fluorescence parameters | ||
|---|---|---|
| F0 | = | F50μs, fluorescence intensity at 50 μs |
| FK | = | F400μs fluorescence intensity at the K step (at 400 μs) |
| FJ | = | F2ms, fluorescence intensity at the J step (at 2 ms) |
| FI | = | F30ms, fluorescence intensity at the I step (at 30 ms) |
| FM | = | Maximum fluorescence intensity |
| FV | = | (FM – F0), variable fluorescence from a dark adapted leaf |
| FV/FM | = | Maximum quantum efficiency of PSII photochemistry. |
| tFM | = | Time to reach FM, in ms |
| VK | = | (FK – F0) / (FM – F0), relative variable fluorescence at 400 μs |
| VJ | = | (FJ – F0) / (FM – F0), relative variable fluorescence at 2 ms |
| VI | = | (FI – F0) / (FM – F0), relative variable fluorescence at 30 ms |
| Area | = | Area under the curve between F0 and FM |