Vol. 21, issue 07, article # 11

Abstract:

Literature data on the dependence of the far-red/red ratio of fluorescence intensities measured at the temperature of liquid nitrogen in the culture of cyanobacteria and pea leaves, as well as our experimental results on determining fluorescence signals obtained at the room temperature on wheat leaves, on the number of reaction centers of photosystem I, have been analyzed. With increase of the concentration of reaction centers, the ratio of maxima of the red chlorophyll fluorescence grows linearly. The conclusion is inferred that the obtained dependence is characteristic for all photosynthesizing organisms, evolving oxygen.

Keywords:

fluorescence, chlorophyll, first photosystem, F₇₃₄/ F₆₈₂ ratio