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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Histolocalization of chemotaxonomic markers in Brazilian Vernonieae (Asteraceae)

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Autor(es):
Lusa, Makeli G. ; Da Costa, Fernando B. ; Appezzato-da-Gloria, Beatriz
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: Botanical Journal of the Linnean Society; v. 182, n. 3, p. 581-593, NOV 2016.
Citações Web of Science: 6
Resumo

Vernonieae are well represented in South America by subtribe Lychnophorinae, with 104 Brazilian species, some of them rare and endangered. Lychnophorinae are well known for producing metabolites of high pharmaceutical and chemotaxonomic value. Despite the importance of secondary metabolites in Lychnophorinae, there is still little evidence regarding the secretory structures responsible for producing these compounds. Therefore, in this study we investigated 15 species representative of the main lineages of Lychnophorinae, with the following objectives: to identify where the chemotaxonomic markers of Lychnophorinae are secreted and stored and in which developmental stage of the organ these metabolites are found. Samples of stems and leaves were processed according to the usual techniques in plant anatomy. It was found that the main sites of secondary metabolite biosynthesis are glandular trichomes, epidermal cells and parenchyma tissues. Metabolites from glandular trichomes, especially sesquiterpene lactones (STL), are prevalent in the early developmental stages of organs. The metabolite compounds stored in parenchyma tissues are mainly terpenoids, flavonoids and other phenolic compounds; young and expanded leaves are equally rich in metabolites. Thus, the information obtained in this study is essential for conducting chemotaxonomic studies in this group, helping to promote selective collection and conservation of species. (AU)

Processo FAPESP: 10/51454-3 - Estudos morfoanatômicos, metabolômicos e moleculares como subsídios à sistemática de espécies de Asteraceae e acesso ao seu potencial farmacológico
Beneficiário:Beatriz Appezzato da Glória
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 10/02085-5 - Morfoanatomia e fitoquímica de espécies da subtribo Lychnophorinae (Asteraceae: Vernonieae) como subsídios para a análise filogenética do grupo
Beneficiário:Makeli Garibotti Lusa
Linha de fomento: Bolsas no Brasil - Doutorado