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Title: Stilbenes from Deguelia rufescens var. urucu (Ducke) A. M. G. Azevedo leaves: effects on seed germination and plant growth
metadata.dc.creator: LÔBO, Lívia Trindade
SILVA, Geilson Alcantara da
FREITAS, Manolo Cleiton Costa de
SOUZA FILHO, Antonio Pedro da Silva
SILVA, Milton Nascimento da
ARRUDA, Alberto Cardoso
GUILHON, Giselle Maria Skelding Pinheiro
SANTOS, Lourivaldo da Silva
SANTOS, Alberdan Silva
ARRUDA, Mara Silvia Pinheiro
Keywords: Amazônia brasileira
Timbó vermelho
Deguelia rufescens var. urucu
Planta daninha
Issue Date: 2010
Citation: LOBO, Lívia T. et al. Stilbenes from Deguelia rufescens var. urucu (Ducke) A. M. G. Azevedo leaves: effects on seed germination and plant growth. Journal of the Brazilian Chemical Society, São Paulo, v. 21, n. 10, p. 1838-1844, 2010. Disponível em: <>. Acesso em: 21 dez. 2011. <>.
Abstract: The Amazon biodiversity may provide plants whose chemical substances are capable of controlling weeds. In this study we report the isolation and identification of five stilbenes from the leaves of "timbó vermelho" (Deguelia rufescens var. urucu): 4-methoxylonchocarpene (1); 3,5-dimethoxy-4´-hydroxy-3´-prenyl-trans-stilbene (2), lonchocarpene (3), 3,5-dimethoxy-4´-O-prenyl-trans-stilbene (4) and pterostilbene (5). Compounds 2 and 4 are new natural products although 2 has been previously cited as synthesis product. Potential allelopathic activity for 1, 2 and 4 was evaluated over seed germination and plant growth of Mimosa pudica weed. The observed effects on seed germination did not vary significantly (p > 0.05) when the analysis of phytotoxicity was performed with the substances alone, the maximum inhibition did not exceed 20%. The most intense inhibitions on radicle and hypocotyl development were found for compound 4 (p < 0.05). When tested in pairs, showed antagonism for seed germination and synergism for radicle and hypocotyl development.
ISSN: 0103-5053
Appears in Collections:Artigos Científicos - FAQUI/ICEN

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