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Article

Impact of Drought Exerted during Spike Development on Tillering, Yield Parameters and Grain Chemical Composition in Semi-Dwarf Barley Mutants Deficient in the Brassinosteroid Metabolism

1
Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Jagiellonska 28, 40-032 Katowice, Poland
2
The Franciszek Gorski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow, Poland
3
Department of Agroecology and Plant Production, University of Agriculture in Krakow, Mickiewicza 21, 31-120 Krakow, Poland
4
Department of Plant Breeding, Physiology and Seed Science, University of Agriculture in Krakow, 30-239 Krakow, Poland
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(10), 1595; https://doi.org/10.3390/agronomy10101595
Received: 25 September 2020 / Revised: 14 October 2020 / Accepted: 16 October 2020 / Published: 18 October 2020
(This article belongs to the Special Issue The Role of Growth Regulators in Crop under Abiotic Stress)
Drought is a major factor limiting plant development and negatively affecting crop yield. It was reported that mutants defective in the brassinosteroid (BR) metabolism from several species, including barley (Hordeum vulgare), show improved tolerance to drought during the vegetative phase of growth. Hence, semi-dwarf barley mutants defective in the BR metabolism may be regarded as an alternative in breeding programs. Occurrence of drought during spike development has a profound effect on yield. Thus, determining reaction of the semi-dwarf, BR-deficient barley mutants to drought during the reproductive phase is crucial. This study was conducted on barley Near-Isogenic Lines defective in the BR metabolism and the reference ‘Bowman’ cultivar. The experiments were performed under laboratory (optimal watering and drought) and field conditions. The following yield-related parameters were analyzed: total tillering, productive tillering, average grain weight per plant and per spike, as well as weight of 1000 seeds. Additionally, an analysis of chemical composition of grain was performed. The BR-insensitive BW312 line showed the highest values of the productive tillering and grain weight per plant under the drought conditions. Perturbations in the BR metabolism did not have any significant deteriorating effect on the contents of grain chemical ingredients. View Full-Text
Keywords: barley; brassinosteroids; drought; grain composition; Near-Isogenic Lines; tillering; yield barley; brassinosteroids; drought; grain composition; Near-Isogenic Lines; tillering; yield
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MDPI and ACS Style

Gruszka, D.; Janeczko, A.; Puła, J.; Lepiarczyk, A.; Pociecha, E. Impact of Drought Exerted during Spike Development on Tillering, Yield Parameters and Grain Chemical Composition in Semi-Dwarf Barley Mutants Deficient in the Brassinosteroid Metabolism. Agronomy 2020, 10, 1595. https://doi.org/10.3390/agronomy10101595

AMA Style

Gruszka D, Janeczko A, Puła J, Lepiarczyk A, Pociecha E. Impact of Drought Exerted during Spike Development on Tillering, Yield Parameters and Grain Chemical Composition in Semi-Dwarf Barley Mutants Deficient in the Brassinosteroid Metabolism. Agronomy. 2020; 10(10):1595. https://doi.org/10.3390/agronomy10101595

Chicago/Turabian Style

Gruszka, Damian, Anna Janeczko, Joanna Puła, Andrzej Lepiarczyk, and Ewa Pociecha. 2020. "Impact of Drought Exerted during Spike Development on Tillering, Yield Parameters and Grain Chemical Composition in Semi-Dwarf Barley Mutants Deficient in the Brassinosteroid Metabolism" Agronomy 10, no. 10: 1595. https://doi.org/10.3390/agronomy10101595

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