The respiratory chain and the phycobilisomes affect chl a parameters.

Values shown were derived from the experiments as depicted and described in Fig 1. All values were normalized to OD730. chl a, chlorophyll a concentration in mg L-1; F0, level of fluorescence in the dark; FM, fluorescence measured by applying a strong light pulse (2,000 μmol photons m-2 s-1) in the dark; FV, variable fluorescence (FM-F0); ϕPSII, quantum yield of PSII ((FM-F0)/FM) calculated using F0 and FM (max) or F0' and FM' under growth light conditions (GL).*, derived using FM values after addition of 20 μM DCMU in the light (400 μmol photons m-2 s-1). Values are averages of duplicate measurements with standard deviation.The respiratory chain and the phycobilisomes affect chl a parameters.