Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/971153
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dc.contributor.authorSILVA, E. A. S. dapor
dc.contributor.authorLÔBO, L. T.por
dc.contributor.authorSILVA, G. A. dapor
dc.contributor.authorSOUZA FILHO, A. P. da S.por
dc.contributor.authorSILVA, M. N. dapor
dc.contributor.authorARRUDA, A. C.por
dc.contributor.authorGUILHON, G. M. S. P.por
dc.contributor.authorSANTOS, L. S.por
dc.contributor.authorARRUDA, M. S. P.por
dc.contributor.otherEWERTON A. S. DA SILVA, PÓS-GRADUANDA UFPA; LIVIA T. LÔBO, PÓS-GRADUANDA UFPA; GEILSON A. DA SILVA, PÓS-GRADUANDA UFPA; ANTONIO PEDRO DA SILVA SOUZA FILHO, CPATU; MILTON N. DA SILVA, PÓS-GRADUANDA UFPA; ALBERTO C. ARRUDA, PÓS-GRADUANDA UFPA; GISELLE M. S. P. GUILHON, PÓS-GRADUANDA UFPA; LOURIVALDO S. SANTOS, PÓS-GRADUANDA UFPA; MARA S. P. ARRUDA, PÓS-GRADUANDA UFPA.por
dc.date.accessioned2013-11-13T11:11:11Zpor
dc.date.available2013-11-13T11:11:11Zpor
dc.date.created2013-11-13por
dc.date.issued2013por
dc.identifier.other48644por
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/971153por
dc.descriptionIn some previous studies, we described the isolation of nine compounds from leaves of Derris urucu, a species found widely in the Amazon rainforest, identified as five stilbenes and four dihydroflavonols. In this work, three of these dihydroflavonols [urucuol A (1), urucuol B (2) and isotirumalin (3)] were evaluated to identify their potential as allelochemicals, and we are also reporting the isolation and structural determination of a new flavonoid [5,3′-dihydroxy-4′-methoxy-(7,6:5′′,6′′)-2′′,2′′-dimethylpyranoflavanone (4)]. We investigated the effects of the dihydroflavonols 1-3 on seed germination and radicle and hypocotyl growth of the weed Mimosa pudica, using solutions at 150 mg.L-1. Urucuol B, alone, was the substance with the greatest potential to inhibit seed germination (26%), while isotirumalin showed greater ability to reduce the development of the hypocotyl (25%), but none of the three substances showed the potential to inhibit radicle. When combined in pairs, the substances showed synergism for the development of root and hypocotyl and effects on seed germination that could be attributed to antagonism. When tested separately, the trend has become more intense effects on seed germination, while for the substances tested in pairs, the intensity of the effect was greater on development of weed.por
dc.description.uribitstream/item/92512/1/0001-3765-aabc-85-03-881.pdfpor
dc.languageenpor
dc.language.isoengeng
dc.publisherAnais da Academia Brasileira de Ciências, v. 85, n. 3, p. 881-889, 2013.por
dc.relation.ispartofEmbrapa Amazônia Oriental - Artigo em periódico indexado (ALICE)por
dc.rightsopenAccesspor
dc.subjectDerris urucupor
dc.subjectGerminação de sementes.por
dc.titleFlavonoids from leaves of Derris urucu: assessment of potential effects on seed germination and development of weeds.por
dc.typeArtigo em periódico indexado (ALICE)por
dc.date.updated2015-04-07T11:11:11Zpor
dc.subject.thesagroAlelopatiapor
dc.subject.thesagroFlavonóide.por
dc.ainfo.id971153por
dc.ainfo.lastupdate2015-04-07por
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