Journal of the Brazilian Chemical Society | |
Stilbenes from Deguelia rufescens var. urucu (Ducke) A. M. G. Azevedo leaves: effects on seed germination and plant growth | |
Lívia T. Lobo2  Geilson A. Da Silva2  Manolo C. C. De Freitas2  Antonio Pedro S. Souza Filho1  Milton N. Da Silva2  Alberto C. Arruda2  Giselle M. S. P. Guilhon2  Lourivaldo S. Santos2  Alberdan S. Santos2  Mara S. P. Arruda2  | |
[1] ,Universidade Federal do Pará Instituto de Ciências Exatas e Naturais Programa de Pós-Graduação em QuímicaBelém PA ,Brazil | |
关键词: Deguelia rufescens var. urucu; stilbenes; allelopathy; allelochemicals; phytotoxicity; germination and growth inhibitions; | |
DOI : 10.1590/S0103-50532010001000007 | |
来源: SciELO | |
【 摘 要 】
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.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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