Ecological relations of agricultural populations of ecdysteroid-containing plants Rhaponticum carthamoides (Willd.) Iljin and Serratula coronata L. with herbivorous insects report 2. Composition variability of phytoecdysteroids in agrocenoses and their role in the vulnerability of plants to phytophagans

Chromatographic separation, determination and identification of ecdysteroids: Focus on Maral root (Rhaponticum carthamoides, Leuzea carthamoides)

“…They possess side-chain at position 17 (Figure 1), which is susceptible to chemical modifications during biosynthesis and metabolism. The main chemical transitions of ecdysteroids are: hydroxylation (usually at position 5,11,25,26), oxidation (position 26), βand γ-lactam ring formation (mainly side chain), alkylation (branched side chain at position 24) and conjugation (between neighboring hydroxyl groups at positions 2 and 3, 20 and 22). Hydroxyl groups could be modified by different chemical moieties, such as polar glycosides, phosphates, sulfates or nonpolar esters, ethers, acetates and benzoates [11,[28][29][30][31].…”

“…Ecdysteroids occur in underground (roots and rhizomes) as well as aerial plant parts (vegetative – leafs, stalks and generative – flowers and seeds). The concentration of ecdysteroids varies in time depending on the vegetative season and ranges from 0.04 to 0.81% (of d.w.) in roots, 0.03–1.22% (of d.w.) in leaves to 0.27–1.51% (of d.w.) in seeds . 20‐Hydroxyecydsone (β‐ecdysone, ecdysterone, polypodine A, Supporting Information Table S1, p.1) is the most common among ecdysteroids, although α‐ecdysone (Supporting Information Table S1, p. 36) and inokosterone (Supporting Information Table S1, p. 10) are also present in high concentrations .…”

ОПЫТ КУЛЬТИВИРОВАНИЯ ЛЕВЗЕИ САФЛОРОВИДНОЙ Rhaponticum carthamoides (Willd.) Iliin В КАЧЕСТВЕ РЕСУРСНОГО ИСТОЧНИКА ЭКДИСТЕРОНА В УСЛОВИЯХ АРХАНГЕЛЬКОЙ ОБЛАСТИ

“…Воробьиные (Passeridae), соцветий (единичные поражения в некоторые годы) в фазу формирования семяпочек -жуки-бронзовки Oxythyrea funesta, Potosia cuprea ssp. metallica (Cetoniinae), восковик полосатый, или перевязанный, Trichius fasciatus (Scarabaeidae: Trichiinae) (61).…”

“…Экдизон в надземных репродуктивных органах синтезировался синхронно их развитию: в начале вегетации в генеративных побегах он не обнаружен, во время цветения его долевое участие достигало 9,1 %, в период налива семян и плодоношения -17,8-18,7 %. В период обильного плодоношения долевое участие экдизона возрастало и в вегетативных побегах, хотя в меньшей степени -с 1,5 до 4,7 % в фазе бутонизации и до 13,3 % в фазе цветения (61).…”