The taxonomic relevance of Naphthoquinones in tropical pitcher plants (Nepenthes L., Nepenthaceae)

The distribution of the naphthoquinones ramentaceone and plumbagin was studied among 50 taxa genus Nepenthes. Naphthoquinone patterns support classifications based on homology plastid and/or nuclear genes to some extent, with predominant in sections Nepenthes, Urceolatae, Tentaculatae, Regiae, Insignes Villosae, both isomers present without clear predominance Pyrophytae Montanae. Only 9 96 species contained same plant. data from artificial hybrids known parentage allowed conclusions biosynthesis these compounds heredity respective enzymatic steps.