The paper presents the results of studies devoted to the study of the rare for Dagestan species Nectaroscordum tripedale Trautv., Included in the Red Data Books of Russia and Dagestan, as endangered (rarity category 1). The aim of this work was to assess the content of phenolic compounds and the antioxidant activity of the aerial part of N. tripedale. Plant raw materials were collected in the vegetation and flowering phase, and the content of phenolic compounds was studied, both in fresh raw materials and in frozen ones. Determination of the content of phenolic compounds and antioxidant activity was carried out in water - ethanol extracts (70% ethanol solution) according to standard methods. The content of phenolic compounds is higher in fresh raw materials than in dried ones. The analysis showed that the leaves contain more flavonoids and anthocyanins than the rest, and the least of them is in the flower arrows. Evaluation of the total content of antioxidants in water - ethanol extracts from the aboveground part of the Dagestan N. tripedale samples. The data of phytochemical studies are of great importance and contribute to supplementing the available information on the dynamics of the accumulation of primary and secondary metabolites in herbaceous plants on the territory of Dagestan.
As a result of the experimental studies, results were obtained on the variability of the traits of seed productivity of the narrow-local endemic of Dagestan – Allium charadzeae under various conditions along the altitude gradient. Analysis of the data obtained revealed significant differences in the indicators of seed productivity of individuals. The actual seed productivity is significantly inferior to the potential, which indicates a low degree of realization of the potential for seed formation in mountainous conditions. With an increase in the height above sea level of the experimental plots, the absolute indicators of traits of seed productivity decrease (the number of fruits in the umbrella from 14.9 to 8.5, the number of flowers in the inflorescence from 24.7 to 12.1, the number of seeds in the umbrella from 26.6 up to 19). At the same time, the relative indicators, the percentage of fruit blossoming from 60.5 to 71.2 and the coefficient of seed production from 0.17 to 0.27 increases. As a result of the analysis of variance, a significant influence of the conditions of the year and altitude above sea level on the studied characteristics was revealed.
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