Journal of Siberian Federal University. Biology / Expression of Genes Involved in Phenolics and Lignin Biosynthesis in Zinnia elegans under Saline Stress

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Issue
Journal of Siberian Federal University. Biology. 2023 16 (2)
Authors
Tugbaeva, Anastasia S.; Ermoshin, Alexander A.; Wuriyanghan, Hada; Kiseleva, Irina S.
Contact information
Tugbaeva, Anastasia S.: Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg, Russian Federation; ; ORCID: 0000-0001-9231-3650; Ermoshin, Alexander A.: Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg, Russian Federation; ORCID: 0000-0003-2784-4898; Wuriyanghan, Hada: Inner Mongolia University Hohhot, China; ORCID: 0000-0002-2762-0926; Kiseleva, Irina S.: Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg, Russian Federation; ORCID: 0000-0002-8709-5203
Keywords
cell wall; hydrogen peroxide; phenolics; lignin; salinization
Abstract

Salinization is a common type of agricultural land degradation. It causes inhibition of plant growth and productivity. Previous research into mechanisms of plant resistance to salinity and other stressors has shown that one of nonspecific responses is cell wall lignification which limits translocation of water and ions in the tissues and the whole plant. The current study aims to investigate the responses of Zinnia elegans Jacq. grown under regular soil irrigation with 50 mM NaCl. Plant growth parameters and biochemical characteristics, such as the level of hydrogen peroxide and malondialdehyde (MDA), and phenolics and lignin content, were determined. The level of expression of genes encoding the biosynthesis of phenolic compounds and lignin was evaluated by the relative number of transcripts. Application of 50 mM NaCl to soil decreased plant growth and induced lipid peroxidation in stem tissues, despite an increase in the concentration of phenolic compounds. It means that the antioxidant potential of produced phenolics might be insufficient for plant protection. The amount of lignin in stem tissues increased mainly due to Klason lignin which is known to limit cell elongation. The concentration of phenolic compounds correlated with the expression of PAL, C4H and 4CL genes involved in their biosynthesis; and the amount of lignin correlated with the expression level of CCR, CAD, PRX, and LAC genes

Pages
193–205
EDN
FCXTTL
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/150838

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