The effect of soil drought on the content of photosynthetic pigments in barley plants of the Brovar variety

  • Tatsiana G. Kaliaha Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, 27 Akademičnaja Street, Minsk 220072, Belarus https://orcid.org/0000-0001-7727-3451
  • Nikolay V. Kozel Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, 27 Akademičnaja Street, Minsk 220072, Belarus https://orcid.org/0000-0003-2958-7645

Abstract

A significant effect of soil drought on the morphometric parameters of the leaves of barley plants of the Brovar variety, as well as the content of photosynthetic pigments (chlorophyll, carotenoids) in them was established. However, a significant decrease in plant growth indicators under drought conditions, a decrease in the amount of chlorophyll and, to a greater extent, carotenoids occurred against the background of the absence of a change in the content of pheophytin. We assume that the decrease in the number of pigments is mainly associated not with destruction due to stress, but with a decrease in their synthesis, which can be an adaptive reaction of plants, which minimizes the likelihood of formation of reactive oxygen species in photosynthetic membranes under conditions of drought, and also optimizes the use of light energy for photosynthetic processes under such conditions, as indicated by the predominant decrease in carotenoids such as neoxanthin, violaxanthin and β-carotene, which are actively involved in light harvesting and energy transfer to reaction centers.

Author Biographies

Tatsiana G. Kaliaha, Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, 27 Akademičnaja Street, Minsk 220072, Belarus

junior researcher at the laboratory of biophysics and biochemistry of plant cells

Nikolay V. Kozel, Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, 27 Akademičnaja Street, Minsk 220072, Belarus

PhD (biology); head of the laboratory of biophysics and biochemistry of plant cells

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Published
2020-12-31
Keywords: soil drought, abiotic stress, photosynthesis, photosynthetic pigments, chlorophyll, carotenoids, pheophytin, barley
How to Cite
Kaliaha, T. G., & Kozel, N. V. (2020). The effect of soil drought on the content of photosynthetic pigments in barley plants of the Brovar variety. Experimental Biology and Biotechnology, 3, 46-53. https://doi.org/10.33581/2521-1722-2020-3-46-53