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Type: Artigo de periódico
Title: Tropane and pyrrolizidine alkaloids in the ithomiines Placidula euryanassa and Miraleria cymothoe (Lepidoptera: Nymphalidae)
Author: Freitas, AVL
Trigo, JR
Brown, KS
Witte, L
Hartmann, T
Barata, LES
Abstract: Larvae of the ithomiine butterfly Placidula euryanassa sequester tropane alkaloids (TAs) from the host plant Brugmansia suaveolens and pass them through the pupae to freshly emerged adults. Wild caught adults also show in their tissues, variable amounts of pyrrolidizine alkaloids (PAs), probably sequestered from variable plant sources and subject to dynamics of incorporation, accumulation and utilization of PAs by ithomiine butterflies. The ratio TAs/PAs is also variable between different populations. Miraleria cymothoe, another ithomiine that feeds on B. suaveolens as larvae, does not sequester TAs from the host-plant, but sequesters PAs from plant sources visited by the adult butterflies. The main alkaloid found in both butterflies is lycopsamine, which also is the principal PA found in all genera of Ithomiinae.
Subject: chemical defense
tropane alkaloids
pyrrolizidine alkaloids
Placidula euryanassa
Miraleria cymothoe
Brugmansia suaveolens
Country: Suíça
Editor: Springer Basel Ag
Rights: fechado
Identifier DOI: 10.1007/BF01239482
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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