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The primary processes of photosynthesis in seedlings of rice oryza sativa cultivars of varying productivity






Fiziologiya i Biokhimiya Kul'turnykh Rastenii 15(4): 327-332

The primary processes of photosynthesis in seedlings of rice oryza sativa cultivars of varying productivity

Characteristics of a photosynthetic system were studied in seedlings of rice varieties differing in productivity. Determination of the basal photosynthetic electron transport revealed no differences between the varieties. The presence of the phosphate-acceptor system and protonophores (uncouplers) significantly increased the electron transport rate in chloroplasts of productive varieties. The chloroplasts are also characterized by a greater value of the stationary proton gradient and by higher rates of photophosphorylation and the Mg2+-dependent ATPase activity. Processes of the light energy storage in ATP chemical bonds are more effective in the chloroplasts of the rice productive varieties.


Accession: 006740767



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