ON CERTAIN PECULIARITIES OF PHOTOCHEMICAL ACTIVITY IN CHLOROPLASTS OF UPPER LEAVES OF WHEAT AND ITS ALLOCYTOPLASMIC HYBRIDS AT THE TILLERING AND FLOWERING STAGES ArticleSEMENOV O.G., LYSENKO G.G.FIZIOLOGIYA I BIOKHIMIYA KULTURNYKH RASTENII. Vol. 19. 1987. P.. 160-164