title: Chemodiversity of exudate flavonoids in seven tribes of Cichorioideae and Asteroideae (Asteraceae).
abstract: Members of several genera of Asteraceae, belonging to the tribes Mutisieae, Cardueae, Lactuceae (all subfamily Cichorioideae), and of Astereae, Senecioneae, Helenieae and Heliantheae (all subfamily Asteroideae) have been analyzed for chemodiversity of their exudate flavonoid profiles. The majority of structures found were flavones and flavonols, sometimes with 6- and/or 8-substitution, and with a varying degree of oxidation and methylation. Flavanones were observed in exudates of some genera, and, in some cases, also flavonol- and flavone glycosides were detected. This was mostly the case when exudates were poor both in yield and chemical complexity. Structurally diverse profiles are found particularly within Astereae and Heliantheae. The tribes in the subfamily Cichorioideae exhibited less complex flavonoid profiles. Current results are compared to literature data, and botanical information is included on the studied taxa.
authors.affiliation: Department of Plant Systematics and Evolution - Comparative and Ecological Phytochemistry, University of Vienna, Rennweg 14, A-1030 Wien, Austria.
authors.forename: Karin M
authors.initials: KM
authors.lastname: Valant-Vetschera
authors.forename: Eckhard
authors.initials: E
authors.lastname: Wollenweber
mesh_terms: D019659:Asteraceae / Q000737:chemistry* / Q000145:classification; D044822:Biodiversity; D047309:Flavones / Q000737:chemistry* / Q000302:isolation & purification; D005419:Flavonoids / Q000145:classification* / Q000302:isolation & purification*; D035261:Plant Components, Aerial / Q000737:chemistry; D013045:Species Specificity
chemical_list: D047309:Flavones; D005419:Flavonoids