Fig. 4
From: Sugar management and photosynthesis of sugar beet after infection by Cercospora beticola
Changes in relative variable fluorescence (A) and fluorescence parameters (B) of the leaves of three sugar beet cultivars: Viola (V), Jaromir (J), and Pulitzer (S), in different months (September—IX, October—X, November—IX). Each relative value of the measured parameters is the mean (n = 60). Asterisks plotted on spider chart denote significant differences between reference (October—X, equals 1 for all cultivars) and other months, according to the Fisher LSD test (P ≤ 0.05). In the Fig. 4A the October curve was also regarded as a control, and its value for each cultivar is equal to 0. Abbreviations: F0—minimal fluorescence; Fm—maximal fluorescence; Fv—variable fluorescence; φP0—maximum quantum yield of primary photochemical reactions, ΨE0 − probability (at time 0) that a trapped exciton moves an electron into the electron transport chain beyond QA–; φE0—quantum efficiency of electron transfer from QA– to electron transport chain beyond QA–, 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 terminal electron acceptors on the acceptor side of PSI.
