Chemotaxonomic markers in Digitalideae (Plantaginaceae).
In a chemosystematic investigation of Digitalideae (Plantaginaceae), the water-soluble part of extracts of two species of Digitalis, two species of Isoplexis, as well as Erinus alpinus and Lafuentea rotundifolia were studied with regard to their content of main carbohydrates, iridoids and caffeoyl phenylethanoid glycosides (CPGs). Digitalis and Isoplexis contained sorbitol, cornoside and a number of other phenylethanoid glycosides including the new tyrosol beta-D-mannopyranoside, sceptroside but were found to lack iridoid glucosides. Erinus contained mainly glucose, the new 8,9-double bond iridoid, erinoside, and a number of known iridoid glucosides including two esters of 6-rhamnopyranosylcatalpol, as well as the CPG poliumoside. Finally, Lafuentea was characterized by the presence of glucose, aucubin and cryptamygin B but apparently lacked CPGs. The chemosystematic significance of the isolated compounds is discussed.
Taskova
Rilka Mladenova
RM
Department of Chemistry, The Technical University of Denmark, DK-2800 Lyngby, Denmark.
Gotfredsen
Charlotte Held
CH
Jensen
Søren Rosendal
SR
D002241:Carbohydrates / Q000145:classification / Q000302:isolation & purification*; D002965:Classification; D006027:Glycosides / Q000145:classification / Q000302:isolation & purification; D039823:Iridoids / Q000145:classification / Q000302:isolation & purification*; D015394:Molecular Structure; D010936:Plant Extracts / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010943:Plantago / Q000737:chemistry* / Q000145:classification*
D002241:Carbohydrates; D006027:Glycosides; D039823:Iridoids; D010936:Plant Extracts