[Natural nucleotide polymorphism of the Srlk gene that determines salt stress tolerance in alfalfa (Medicago sativa L)].

Based on legume genome syntheny, the nucleotide sequence of Srlk gene, key role of which in response to salt stress was demonstrated for the model species Medicago truncatula, was identified in the major forage and siderate crop alfalfa (Medicago sativa). In twelve alfalfa samples originating from regions with contrasting growing conditions, 19 SNPs were revealed in the Srlk gene. For two nonsynonymous SNPs, molecular markers were designed that could be further used to analyze the association between Srlk gene nucleotide polymorphism and the variability in salt stress tolerance among alfalfa cultivars.

[Evaluation of the uptake of crystalline amino acid preparations based on the concentration of urea in the blood and tissues].

The assimilation of polyamine, levamine and "new" alvesin has been experimentally assessed by blood and tissue urea concentrations. It has been established that polyamine was best assimilated and was followed by levamine and "new" alvesin.