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