Infraspecific variation in the chemistry of glandular trichomes of two Brazilian Viguiera species (Heliantheae; Asteraceae)

Autor(es)

Fernando B. Da Costa ^[1] ; Karin Schorr ^[2] ; Nilton S. Arakawa ^[3] ; Edward E. Schilling ^[4] ; Otmar Spring ^[5]

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo. Faculdade de Ciências Farmacêuticas de Ribeirão Preto - Brasil

^[2] Universidade de São Paulo. Faculdade de Ciências Farmacêuticas de Ribeirão Preto - Brasil

^[3] Universidade de São Paulo. Faculdade de Ciências Farmacêuticas de Ribeirão Preto - Brasil

^[4] University of Tennessee. Department of Botany - Estados Unidos

^[5] Universität Hohenheim. Institut für Botanik - Alemanha

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 12, n. 3, p. 403-407, 2001-06-00.

Resumo

A chemical survey on the glandular trichome chemistry of different populations of two Brazilian Viguiera species has been performed by the glandular trichome microsampling technique and isocratic HPLC analyses. In all six analysed samples of V. robusta, the furanoheliangolide budlein A and its tiglate and methacrylate isomers were detected as the major compounds. They were accompanied by various constituents in mostly minor or trace amounts. The chemical pattern of all samples was qualitatively very similar, thus featuring V. robusta as a taxon of high "chemoconsistency". In contrast, V. quinqueremis represented an example of "chemodiversity". Although budlein A and its derivatives were present in five of the six analysed populations, other heliangolides and germacrolides co-occurred and partly dominated in quantity. Distinct compound patterns divided the samples of V. quinqueremis into three chemical subgroups. (AU)

• Processo FAPESP: 97/05729-4 - Quimiotaxonomia de especies de viguiera (asteraceae) e implantacao da tecnica de microanalise.
• Beneficiário: Fernando Batista da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 98/04213-7 - Investigação fitoquímica de espécies brasileiras do gênero Vigueira Asteraceae através da técnica de microanálise
• Beneficiário: Fernando Batista da Costa
• Modalidade de apoio: Bolsas no Exterior - Pesquisa