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Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: lichens, usnic acid, annual dynamic, temperature, Central Yakutia, лишайники, усниновая кислота, годовая динамика, температура, Центральная Якутия
Annual dynamics of the content of usnic acid, the most frequently encountered and well-studied representative of lichen substances thalli Cladonia stellaris, Cladonia arbuscula and Flavocetraria cucullata, growing in pine- crowberry-cowberry-lichen forest, located in the vicinity of Yakutsk was studied. Determination of usnic acid in lichen thalli analyze by high performance liquid chromatography showed that the highest content of usnic acid (1,6–1,.7% of dry weight) is typical for lichens, collected in the June, and the lowest (0,7–0,8% of dry weight) - December. A comparison of monitoring data of temperature on the soil surface and content of usnic acid in lichen thalli were found a direct positive correlation - C. stellaris (r = 0,88; p <0.01), C. arbuscula (r = 0,81; p <0,01 ) and F. cucullata (r = 0,68; p = 0,01), which confirms the important role of the temperature factor in the biosynthesis of a secondary metabolite. The generally show that the best period of the studied lichens collection growing in the conditions of Central Yakutia (sharply continental climate, permafrost) for isolate usnic acid is the beginning of the summer.
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