Determination of the quenching efficiency of the oxidized primary donor of Photosystem I, P700+: Implications for the trapping mechanism

It is widely believed that Photosystem I (PS I) quenching of the excited state in the antenna pigments by the open reaction center (RC), P700, is the same as the closed one, P700. This idea is based on the observation of the same fluorescence yield (Butler 1978; Lavorel and Etienne 1977) and the same fluorescence decay kinetics when the primary donor is… CONTINUE READING