The currently accepted model of primary energy conversion in the plant photosystems must be substantially modernized

According to the contemporary model of primary events in plants, electronic excitations generated in antenna Chls by light rapidly migrate within vast Chl ensembles, reach reaction centers (RCs) and initiate in the latter one s the primary photoreactions of electron transfer from RC special pairs (P7 00 and P680 in plant photosystems), A minor portion of electronic excitatio ns is lost en route, in particular, via fluorescence of Chl-a, A number of fluorescence parameters in vivo were reliably established in many independe nt studies. Basing on these parameters the author calculated a dimensionles s value - the ratio of fluorescence yields emitted by PS-2 and PS-1 Chl-a e nsembles. This ratio turned to be 5-10 rimes higher than that obtained in e xperiments, Such a divergence seems to indicate an internal discrepancy in the contemporary model. In this connection the author suggests a substantia l modernization of this model by introducing for RCs a new subpicosecond st ate that precedes the primary reaction of electron transfer from the RC spe cial pairs.