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dc.contributor.authorFONSECA, R. R. dapt_BR
dc.contributor.authorORTIZ-RAMÍREZ, F. A.pt_BR
dc.contributor.authorCAVALCANTI, D. N.pt_BR
dc.contributor.authorRAMOS, C. J. B.pt_BR
dc.contributor.authorTEIXEIRA, V. L.pt_BR
dc.contributor.authorSOUSA FILHO, A. P. da S.pt_BR
dc.date.accessioned2013-06-27T11:11:11Zpt_BR
dc.date.available2013-06-27T11:11:11Zpt_BR
dc.date.created2013-06-27pt_BR
dc.date.issued2012pt_BR
dc.identifier.citationRevista Brasileira de Farmacognosia, v. 22, n. 4, p. 850-853, July/Aug. 2012.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/960699pt_BR
dc.descriptionFour extracts from the marine red alga Plocamium brasiliense (Greville) M.A.Howe & W.R.Taylor were prepared to identify and characterize their potential allelopathic effects on seed germination, radicle elongation and hypocotyl development of the weeds Mimosa pudica L. and Senna obtusifolia (L.) Irwin & Barneby. The four extracts were prepared in a sequence of solvents of increasing polarity: n-hexane, dichloromethane, ethyl acetate and ethanol/water (7:3). The germination bioassay was carried out at 25 °C with a 12 h photoperiod and the radicle elongation and hypocotyl development at 25 °C with a 24 h photoperiod. The dichloromethane extract showed inhibitory effects on seed germination of both plants (35 and 14%, respectively, in M. pudica and S. obtusifolia), radical germination (52 and 41.7%, respectively) and hypocotyl development (17.1 and 25.5%, respectively). Given the high sensitivity of this parameter to the potential allelopathic effects and the insufficient number of references found in the literature, these results are expected to stimulate new tests with other species of marine algae. Given the high sensitivity of the method for the detection of allelopathic potential, the species P. brasiliense emerges as a possible source of allelopathic substances against weed species. The results are attributed to the chemical composition, especially in relation to the presence of halogenated monoterpenes.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectPlocamium brasilienspt_BR
dc.titleAllelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2015-04-08T11:11:11Zpt_BR
dc.subject.thesagroAlelopatiapt_BR
dc.subject.thesagroGerminaçãopt_BR
riaa.ainfo.id960699pt_BR
riaa.ainfo.lastupdate2015-04-08pt_BR
dc.identifier.doihttp://dx.doi.org/10.1590/S0102-695X2012005000065pt_BR
dc.contributor.institutionRainiomar Raimundo da Fonseca, PÓS-GRADUANDO Universidade Federal Fluminense; Fredy A. Ortiz-Ramírez, PÓS-GRADUANDO Universidade Federal Fluminense; Diana N. Cavalcanti, PÓS-GRADUANDA Universidade Federal Fluminense; Carlos José B. Ramos, UFF; Valéria L. Teixeira, UFF; ANTONIO PEDRO DA SILVA SOUZA FILHO, CPATU.pt_BR
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