The relation far-red to red chlorophyll fluorescence of phototrofs as a parameter of concentration of the reactionary centers of the first photosystem

Literary data of relations of intensities of far-red to the red fluorescence measured at temperature of liquid nitrogen in culture of blue-green algae and leaves of peas are analysed. Own experimental results of determination of the fluorescent signals received at room temperature on leaves of wheat, depending on amount of the reactionary centers of the first photosystem, are presented. It is shown, that the relation of maxima of red chlorophyll fluorescence linearly increase with increase in concentration of the reactionary centers. It is judged, that the received dependence is characteristic for all photosynthesizing organisms allocating oxygen.