title: Chemodiversity of exudate flavonoids in Cassinia and Ozothamnus (Asteraceae, Gnaphalieae).
abstract: The lipophilic exudates deposited on aerial parts of four species of Cassinia and twelve species of Ozothamnus (Asteraceae, Gnaphalieae) have been analyzed for the presence of flavonoid aglycones and some other phenolics. A total of 55 flavonoids were identified, including several rare flavonols. Flavonols are prevailing over flavones, and 8-O-substitution is dominant in both groups. Ozothamnus rosmarinifolius is exceptional in producing several coumarins. Four dihydrobenzofurans have also been identified from this species. Cluster analysis and principal coordinate analysis of the flavonoid data provide support for combining species of Cassinia and Ozothamnus into a single genus.
authors.affiliation: Institut für Botanik der TU Darmstadt, Schnittspahnstrasse 3, D-64287 Darmstadt, Germany. wollenweber@bio.tu-darmstadt.de
authors.forename: Eckhard
authors.initials: E
authors.lastname: Wollenweber
authors.forename: Ralf
authors.initials: R
authors.lastname: Fischer
authors.forename: Marion
authors.initials: M
authors.lastname: Dörr
authors.forename: Kathryn
authors.initials: K
authors.lastname: Irvine
authors.forename: Cliff
authors.initials: C
authors.lastname: Pereira
authors.forename: Jan F
authors.initials: JF
authors.lastname: Stevens
mesh_terms: D047310:Apigenin / Q000737:chemistry / Q000302:isolation & purification; D019659:Asteraceae / Q000737:chemistry*; D001315:Australia; D002109:Caffeic Acids / Q000302:isolation & purification; D005122:Exudates and Transudates / Q000378:metabolism; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification; D035261:Plant Components, Aerial / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D012603:Scopoletin / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D002109:Caffeic Acids; D005419:Flavonoids; D044949:Kaempferols; D010636:Phenols; C051080:ternatin (flavonoid); C006552:kaempferol; D047310:Apigenin; D012603:Scopoletin; C059922:gossypetin; C040048:caffeic acid