Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed.
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/960699 http://dx.doi.org/10.1590/S0102-695X2012005000065 |
Resumo: | Four 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. |
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Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed.Plocamium brasiliensAlelopatiaGerminaçãoFour 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.Rainiomar 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.FONSECA, R. R. daORTIZ-RAMÍREZ, F. A.CAVALCANTI, D. N.RAMOS, C. J. B.TEIXEIRA, V. L.SOUSA FILHO, A. P. da S.2013-06-27T11:11:11Z2013-06-27T11:11:11Z2013-06-2720122015-04-08T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleRevista Brasileira de Farmacognosia, v. 22, n. 4, p. 850-853, July/Aug. 2012.http://www.alice.cnptia.embrapa.br/alice/handle/doc/960699http://dx.doi.org/10.1590/S0102-695X2012005000065enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T01:58:31Zoai:www.alice.cnptia.embrapa.br:doc/960699Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T01:58:31falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T01:58:31Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. |
title |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. |
spellingShingle |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. FONSECA, R. R. da Plocamium brasiliens Alelopatia Germinação |
title_short |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. |
title_full |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. |
title_fullStr |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. |
title_full_unstemmed |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. |
title_sort |
Allelopathic potential of extracts the from marine macroalga Plocamium brasiliense and their effects on pasture weed. |
author |
FONSECA, R. R. da |
author_facet |
FONSECA, R. R. da ORTIZ-RAMÍREZ, F. A. CAVALCANTI, D. N. RAMOS, C. J. B. TEIXEIRA, V. L. SOUSA FILHO, A. P. da S. |
author_role |
author |
author2 |
ORTIZ-RAMÍREZ, F. A. CAVALCANTI, D. N. RAMOS, C. J. B. TEIXEIRA, V. L. SOUSA FILHO, A. P. da S. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Rainiomar 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. |
dc.contributor.author.fl_str_mv |
FONSECA, R. R. da ORTIZ-RAMÍREZ, F. A. CAVALCANTI, D. N. RAMOS, C. J. B. TEIXEIRA, V. L. SOUSA FILHO, A. P. da S. |
dc.subject.por.fl_str_mv |
Plocamium brasiliens Alelopatia Germinação |
topic |
Plocamium brasiliens Alelopatia Germinação |
description |
Four 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. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012 2013-06-27T11:11:11Z 2013-06-27T11:11:11Z 2013-06-27 2015-04-08T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Revista Brasileira de Farmacognosia, v. 22, n. 4, p. 850-853, July/Aug. 2012. http://www.alice.cnptia.embrapa.br/alice/handle/doc/960699 http://dx.doi.org/10.1590/S0102-695X2012005000065 |
identifier_str_mv |
Revista Brasileira de Farmacognosia, v. 22, n. 4, p. 850-853, July/Aug. 2012. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/960699 http://dx.doi.org/10.1590/S0102-695X2012005000065 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503379848790016 |