Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
Fernando B. Da Costa ; Karin Schorr ; Nilton S. Arakawa ; Edward E. Schilling ; Otmar Spring
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: Journal of the Brazilian Chemical Society; v. 12, n. 3, p. 403-407, Jun. 2001.
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 espécies de Viguiera (Asteraceae) e implantação da técnica de microanálise
Beneficiário:Fernando Batista da Costa
Linha de fomento: 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
Linha de fomento: Bolsas no Exterior - Pesquisa