PHYTOECDYSTEROIDS OF ROOT SILENE FRIVALDSZKYANA HAMPE
Abstract
Ecdysteroids were isolated from roots of Silene frivaldszkyana (Caryophyllaceae) introduced into culture in Western Siberia: 20-hydroxyecdysone, polypodine B, integristerone A, 2-deoxy-20-hydroxyecdysone, 2-deoxyecdysone, 20,26-dihydroxyecdysone, 26-hydroxypolypodine B, 26-hydroxyintegristerone A, 20-hydroxyecdysone-25-β-D-glucoside. Structures are installed using NMR, mass spectroscopy, HPLC. The presence of 26-hydroxyintegristerone A in the roots established by comparative HPLC analysis with compound isolated from overground part of plants.
It is shown that this Silene species synthesizes characteristic for this genus of ecdysteroids: 2-deoxy-20-hydroxyecdysone, 2-deoxyecdysone, 20-hydroxyecdysone, polypodine B, integristerone A, and is a rich source of their 26-hydroxy derivatives. Among the common ecdysteroids of the genus Silene 20-hydroxyecdysone-25-β-D-glycoside was isolated for the first from roots of S. frivaldszkyana.
Comparative analysis of ecdysteroids in aboveground and underground parts showed that the roots contain a richer composition of them that is likely so that the roots of perennial plants accumulate these compounds. And 20-hydroxyecdysone-25-β-D-glycoside is a spare substance of major component 20-hydroxyecdysone.
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