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Fiziol. rast. genet. 2016, vol. 48, no. 6, 519-529, doi: https://doi.org/10.15407/frg2016.06.519

Photosynthesis and flag leaf chloroplasts antioxidant enzymes activity in winter wheat plants under urea foliar fertilization

Sokolovska-Sergiienko O.G., Kiriziy D.A., Stasik O.O., Sheheda I.M.

  • Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine 31/17 Vasylkivska St., Kyiv, 03022, Ukraine

The influence of urea foliar feeding at the early reproductive stage on the rate of photosynthesis, chloroplast antioxidant enzymes activity in the flag leaf as well as productivity and grain protein content in modern varieties of winter wheat was studied. It was established that increased supply of winter wheat plants with nitrogen enhanced the content of chlorophyll in the leaves and the photosynthetic CO2 assimilation rate during the period of grain filling, which ultimately enlarged productivity and grain protein content. Urea fertilizing increased activity of SOD and APX in flag leaf, which was accompanied by a decrease in ROS content and apparently contributed to the maintenance of its functioning as a donor of photoassimilates.

Keywords: Triticum aestivum L., winter wheat, photosynthesis, urea, superoxide dismutase, ascorbate peroxidase

Fiziol. rast. genet.
2016, vol. 48, no. 6, 519-529

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