RATE OF THE PHOTOSYNTHESIS OF LEAVES OF VARIETIES SOYBEAN DEPENDING ON THE GROWTH PHASE AND TIERS OF LEAVES
2017
Amelin, A.V. | Chekalin, E.I. | Zaikin, V.V. | Mazalov, V.I. | Salnikova, N.B.
The article presents the results of field and vegetation experiments on the study of the genotypic features of a reaction of dark phase of photosynthesis in soybean plants. It is established that photoactivated leaves of varieties of culture increases sharply in the transition of plants to the generative period of development, reaching maximum values to the phase of mass fruit formation, when the demand for assimilate main intragenomic centers (beans) begins to significantly increase. The intensity of photosynthesis in the period of development of the plant reached 17, and 21 μmol CO2/m2s. The highest photosynthetic activity differed, first of all, the top leaves and the smallest its value was lower. On the 5th layer from the bottom, the intensity of photosynthesis was 3.5 times less in comparison with the leaves, arranged in 3-4 node from the top of the plants. The interval of genotypic variation of photosynthesis intensity in 2015 ranged from 1,65 to 14,18 μmol CO2/m2s in 2016, he was 2,96 − of 16,75 μmol CO2/m2s, and in 2017 – 7,89 -11,34 μmol CO2/m2s. Among the genotypes experienced high and stable intensity of photosynthesis during the development of the vegetation differed in the Samer grade 5, which gives grounds to consider it as promising promising for breeding.
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