Vol. 19, issue 04, article # 9

Zavorueva E.N., Zavoruev V.V. Fluorescent monitoring of small-leaved tree photosynthesis under anthropogenic impact. // Atmospheric and oceanic optics. 2006. V. 19. No. 04. P. 284-286.
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The investigation results on the concentration dependence of birch leaf chlorophyll fluorescence are presented. It is established that variation of the F682/F734 parameter during the vegetation process is described by two parabolas. One parabola refers to the period of the chlorophyll concentration increase up to its maximum and the second one - to the leaf aging. Minimum of the first parabola is observed during the birch flowering while of the second one - before coloring leaves. Red and far-red fluorescence parameters of birch leaf chlorophyll have been determined, which are more informative for early diagnostics of their state under different environmental conditions.