Faculty of Biotechnology and Food Sciences in Nitra Journal of Microbiology, Biotechnology and Food Sciences 1338-5178 special issue 2 (Biotechnology) vol. 4 2015-02-02 2015-02-02 POLYAMINE BIOSYNTHESIS REGULATORS: POTENT MODULATORS OF HERBICIDE STRESS IN SPRING BARLEY (HORDEUM VULGARE) 114 115 EN Pavol Trebichalský Pavol Trebichalský Ján Tomáš Ján Tomáš Ľuboš Harangozo Ľuboš Harangozo Bajčan Daniel Bajčan Daniel Alena Vollmannová Alena Vollmannová Regulators of polyamine biosynthesis, such as 1,3-propylene diamine and γ-aminobutyric acid, are involved in reducing stress in plants. Triazine herbicide application on spring barley plants under conditions of pot experiment reduced grain yield by 1.8 %. After application of mixtures with regulators of polyamine biosynthesis a decline of grain yield was obtained (statistically not significant, by 7-15 %), when compared to variant with only herbicide applied. Triazine herbicide and mixtures with regulators of polyamine biosynthesis reduced one thousand grain weight, slightly increased the number of grains in a spike. Therefore, it would be more efficient to use the regulators of polyamine synthesis independently, not together with the herbicide before tillering.
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