Light Drives and Temperature Modulates: Variation of Phenolic Compounds Profile in Relation to Photosynthesis in Spring Barley
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Published:2023-01-26
Issue:3
Volume:24
Page:2427
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ISSN:1422-0067
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Container-title:International Journal of Molecular Sciences
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language:en
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Short-container-title:IJMS
Author:
Vrábl Daniel1, Nezval Jakub1ORCID, Pech Radomír1, Volná Adriana1, Mašková Petra2ORCID, Pleva Jan1, Kuzniciusová Nikola1, Provazová Michaela1, Štroch Michal13ORCID, Špunda Vladimír13ORCID
Affiliation:
1. Department of Physics, Faculty of Science, University of Ostrava, 710 00 Ostrava, Czech Republic 2. Department of Experimental Plant Biology, Faculty of Science, Charles University, 128 00 Prague, Czech Republic 3. Global Change Research Institute, Czech Academy of Sciences, 603 00 Brno, Czech Republic
Abstract
Accumulation and metabolic profile of phenolic compounds (PheCs; serving as UV-screening pigments and antioxidants) as well as carbon fixation rate (An) and plant growth are sensitive to irradiance and temperature. Since these factors are naturally co-acting in the environment, it is worthy to study the combined effects of these environmental factors to assess their possible physiological consequences. We investigated how low and high irradiance in combination with different temperatures modify the metabolic profile of PheCs and expression of genes involved in the antioxidative enzyme and PheCs biosynthesis, in relation to photosynthetic activity and availability of non-structural carbohydrates (NSC) in spring barley seedlings. High irradiance positively affected An, NSC, PheCs content, and antioxidant activity (AOX). High temperature led to decreased An, NSC, and increased dark respiration, whilst low temperature was accompanied by reduction of UV-A shielding but increase of PheCs content and AOX. Besides that, irradiance and temperature caused changes in the metabolic profile of PheCs, particularly alteration in homoorientin/isovitexin derivatives ratio, possibly related to demands on AOX-based protection. Moreover, we also observed changes in the ratio of sinapoyl-/feruloyl- acylated flavonoids, the function of which is not yet known. The data also strongly suggested that the NSC content may support the PheCs production.
Funder
Czech Science Foundation University of Ostrava Moravian-Silesian Region Ministry of Education, Youth and Sports of the Czech Republic
Subject
Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Computer Science Applications,Spectroscopy,Molecular Biology,General Medicine,Catalysis
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