Flavonoids ofBignoniaceae from the “cerrado” and their possible taxonomic significance
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- Blatt, C.T.T., dos Santos, M.D. & Salatino, A. Pl Syst Evol (1998) 210: 289. doi:10.1007/BF00985673
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Flavones and glycosides of flavones and flavonols were obtained from leaves of five species ofBignoniaceae from the “cerrado”, a savanna ecosystem of Central and Southeast Brazil. A predominance of flavonol glycosides was observed in all samples investigated. Flavones were often found in species of tribeTecomeae and rarely inBignonieae. The species of the former yielded derivatives of 6-hydroxyluteolin. No 6-oxygenated compounds were found in species ofBignonieae. The results point to the flavonoid chemistry evolution ofBignoniaceae following a path of simplification. More complex chemical profiles characterize the more woodyTecomeae rather than the more advancedBignonieae.