Chemotaxonomic markers in Digitalideae (Plantaginaceae)

Members of the genera Digitalis, Isoplexis, Erinus and Lafuentea were studied for iridoids, caffeoyl phenylethanoid glycosides and main carbohydrates. Among the isolated compounds were the new tyrosol mannoside (sceptroside) and the new iridoid glucoside erinoside. The chemosystematic significance o...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 2005-06, Vol.66 (12), p.1440-1447
Main Authors: Taskova, Rilka Mladenova, Gotfredsen, Charlotte Held, Jensen, Søren Rosendal
Format: Article
Language:English
Subjects:
Biological and medical sciences
Caffeoyl phenylethanoid glycosides
Carbohydrates - classification
Carbohydrates - isolation & purification
Chemical constitution
Chemosystematics
Classification
Cornoside
Digitalis
Erinoside
Erinus
Fundamental and applied biological sciences. Psychology
Glycosides - classification
Glycosides - isolation & purification
Iridoid glucosides
Iridoids - classification
Iridoids - isolation & purification
Isoplexis
Lafuentea
Molecular Structure
Plant cytology, morphology, systematics, chorology and evolution
Plant Extracts - isolation & purification
Plant Leaves - chemistry
Plant physiology and development
Plant Stems - chemistry
Plantaginaceae
Plantago - chemistry
Plantago - classification
Sceptroside
Sorbitol
Spermatophyta
Systematics (diagnosis, chromosome numbers)
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Summary:Members of the genera Digitalis, Isoplexis, Erinus and Lafuentea were studied for iridoids, caffeoyl phenylethanoid glycosides and main carbohydrates. Among the isolated compounds were the new tyrosol mannoside (sceptroside) and the new iridoid glucoside erinoside. The chemosystematic significance of the isolated compounds was discussed. 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 β- 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.
ISSN:0031-9422
1873-3700
DOI:10.1016/j.phytochem.2005.04.020