Table 1.
Chlorophyll fluorescence parameters used in this study.
Parameter | Formula | Description |
---|---|---|
Fv/Fm | (Fm − F0)/Fm | Maximum quantum yield of PSII photochemistry measured in the dark-adapted state |
Fv′/Fm′ | (Fm′ − F0’)/Fm′ | Exciton transfer efficiency from antenna pigments to the reaction center of photosystem II (PSII) in the light-adapted state |
Y(PSII) | (Fm′ − Fs)/Fm′ | Effective quantum yield of photochemical energy conversion in PSII |
NPQ | (Fm − Fm′)/Fm′ | Non-photochemical quenching of maximum fluorescence |
qP | (Fm′ − Fs)/(Fm′ − F′0) | Photochemical quenching of PSII |
qN | (Fm − F’m)/(Fm − F′0) | Coefficient of non-photochemical quenching of variable fluorescence |
Y(NO) | 1/[NPQ + 1 + qL(Fm/F0–1)] | Quantum yield of non-regulated energy dissipation in PSII |
Rfd | (Fm − Fs)/Fs | Ratio of fluorescence decline |