Figure 2
Relationships between parameters describing fluorescence and yield of photosystem II under macronutrient deprivation. Values are means (n = 55) after standardization. Asterisks describe significant differences compared with the control, using LSD test (P < 0.05). Parameters: tFm − time (in ms) to reach maximum fluorescence Fm; Area − the area above the chlorophyll fluorescence curve between F0 and Fm (reflecting the size of the plastoquinone pool); F0 − minimum fluorescence; Fm − maximum fluorescence; Fv − maximum variable fluorescence; φP0 − maximum quantum yield of the primary PSII photochemistry; ΨE0 − probability (at time 0) that a trapped exciton moves an electron into the electron transport chain beyond QA–; φE0 − quantum yield for electron transport from QA– to plastoquinone; δR0 − probability with which an electron from the intersystem electron carriers will move to reduce the end acceptors at the PSI acceptor side; φR0 − quantum yield for the reduction of the end electron acceptors at the PSI acceptor side; φD0 − quantum yield (at t = 0) of energy dissipation.
