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Estimations of σPSII), in situ PSII downregulation, and concentration of open RCIIs. Cultures were grown under HL, LL, or SL conditions. The in situ and dark adapted σPSII (A) was simultaneously measured with the in situ ΦPSII and dark-adapted Fv/Fm (B). Data denoted as Fm′ correspond to ΦPSII, and Fm to Fv/Fm in A. C, Estimation Fo/σPSII in the Fm state. Error bars represent sd (n = 3).
