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Article

Insights into Metabolic Reactions of Semi-Dwarf, Barley Brassinosteroid Mutants to Drought

1
Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Jagiellonska 28, 40-032 Katowice, Poland
2
Department of Plant Breeding, Physiology and Seed Science, University of Agriculture in Krakow, 30-239 Krakow, Poland
3
The Franciszek Gorski Institute of Plant Physiology, Polish Academy of Sciences, 30-239 Krakow, Poland
4
Department of Chemistry and Biochemistry, Institute of Basic Sciences, University of Physical Education, 31-571 Krakow, Poland
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(14), 5096; https://doi.org/10.3390/ijms21145096
Received: 3 June 2020 / Revised: 16 July 2020 / Accepted: 17 July 2020 / Published: 19 July 2020
(This article belongs to the Special Issue Brassinosteroids and Plant Steroid Hormone Signaling)
The roles of endogenous brassinosteroids (BRs) in the modulation of reaction to drought and genetic regulation of this process are still obscure. In this study, a multidirectional analysis was performed on semi-dwarf barley (Hordeum vulgare) Near-Isogenic Lines (NILs) and the reference cultivar “Bowman” to get insights into various aspects of metabolic reaction to drought. The NILs are defective in BR biosynthesis or signaling and displayed an enhanced tolerance to drought. The BR metabolism perturbations affected the glucose and fructose accumulation under the control and stress conditions. The BR metabolism abnormalities negatively affected the sucrose accumulation as well. However, during drought, the BR-deficient NILs accumulated higher contents of sucrose than the “Bowman” cultivar. Under the control conditions, accumulation of transcripts encoding antioxidant enzymes ascorbate peroxidase (HvAPX) and superoxide dismutase (HvSOD) was BR-dependent. However, during drought, the accumulation of HvAPX transcript was BR-dependent, whereas accumulations of transcripts encoding catalase (HvCAT) and HvSOD were not affected by the BR metabolism perturbations. The obtained results reveal a significant role of BRs in regulation of the HvAPX and HvCAT enzymatic activities under control conditions and the HvAPX and HvSOD activities during physiological reactions to drought. View Full-Text
Keywords: barley; brassinosteroid; drought; enzymatic antioxidants; semi-dwarf; soluble sugars barley; brassinosteroid; drought; enzymatic antioxidants; semi-dwarf; soluble sugars
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MDPI and ACS Style

Gruszka, D.; Pociecha, E.; Jurczyk, B.; Dziurka, M.; Oliwa, J.; Sadura, I.; Janeczko, A. Insights into Metabolic Reactions of Semi-Dwarf, Barley Brassinosteroid Mutants to Drought. Int. J. Mol. Sci. 2020, 21, 5096. https://doi.org/10.3390/ijms21145096

AMA Style

Gruszka D, Pociecha E, Jurczyk B, Dziurka M, Oliwa J, Sadura I, Janeczko A. Insights into Metabolic Reactions of Semi-Dwarf, Barley Brassinosteroid Mutants to Drought. International Journal of Molecular Sciences. 2020; 21(14):5096. https://doi.org/10.3390/ijms21145096

Chicago/Turabian Style

Gruszka, Damian, Ewa Pociecha, Barbara Jurczyk, Michał Dziurka, Jakub Oliwa, Iwona Sadura, and Anna Janeczko. 2020. "Insights into Metabolic Reactions of Semi-Dwarf, Barley Brassinosteroid Mutants to Drought" International Journal of Molecular Sciences 21, no. 14: 5096. https://doi.org/10.3390/ijms21145096

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