Effect of glyphosate on lipoxygenase of cowpea seed

Detalhes bibliográficos
Autor(a) principal: Cerdeira, Antonio Luiz
Data de Publicação: 2014
Outros Autores: Cole, A. Wayne, Luthe, Dawn S., Koch, Robert B.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/13929
Resumo: The predominant cowpea seed lipoxygenase was optimally activated by calcium at 0.68 mM and at pH 7.5. Seeds were analyzed during germinaton and showed a decrease in lipoxygenase specific activity with time. Seeds from plants treated with the herbicide glyphosate (N - (phosphonomethyl) glycine) showed a significant increase in lipoxygenase content. This could have been a result of senescence, or the effects of the herbicide on those plants. Such a conclusion is basead on findings that a. lipoxygenase, the activity of which was enhanced by glyphosate, has been reported to promote formation of 12-oxo-phytodienoic acid, and b. 12-oxo-phytodienoic acid has been proposed to be a precursor of jasmonic acid, a growth regulator which promotes senescence of plants. With the assay technique utilized, no lipoxygenase was found in mature leaves. 
id EMBRAPA-4_aec28311b2c6a8e86f0b9cf233e34820
oai_identifier_str oai:ojs.seer.sct.embrapa.br:article/13929
network_acronym_str EMBRAPA-4
network_name_str Pesquisa Agropecuária Brasileira (Online)
repository_id_str
spelling Effect of glyphosate on lipoxygenase of cowpea seedEfeito de glifosato em lipoxigenase de semente de caupiVigna unguiculata; calcium; germination; plantsVigna unguiculata; cálcio; germinação; plantasThe predominant cowpea seed lipoxygenase was optimally activated by calcium at 0.68 mM and at pH 7.5. Seeds were analyzed during germinaton and showed a decrease in lipoxygenase specific activity with time. Seeds from plants treated with the herbicide glyphosate (N - (phosphonomethyl) glycine) showed a significant increase in lipoxygenase content. This could have been a result of senescence, or the effects of the herbicide on those plants. Such a conclusion is basead on findings that a. lipoxygenase, the activity of which was enhanced by glyphosate, has been reported to promote formation of 12-oxo-phytodienoic acid, and b. 12-oxo-phytodienoic acid has been proposed to be a precursor of jasmonic acid, a growth regulator which promotes senescence of plants. With the assay technique utilized, no lipoxygenase was found in mature leaves. Foi obtida, com solução de CaCl2 a 0,68 mM e pH 7,5, a atividade máxima de lipoxigenase em sementes de caupi (Vigna unguiculata (L.) Walp). Foram analisadas sementes durante a germinação, e observou-se que a atividade específica de lipoxigenase diminuiu durante o processo. Sementes de plantas tratadas com o herbicida glifosato (N - (fosfonometil) glicina) como dessecante mostraram significante aumento da atividade específica de lipoxigenase. Isto pode ser resultado do efeito do herbicida nas plantas. Tal conclusão é baseada no fato de que a. a lipoxigenase, que teve sua atividade específica aumentada pelo glifosato, pode promover a formação do ácido 12-oxo-fitodienóico; b. este, por sua vez, é um possível precursor do ácido jasmônico, um regulador de crescimento que promove senescência em plantas, explicando-se, desta maneira, a ação do herbicida nelas. Pelo método utilizado, não foi encontrada a enzima em folhas ou outras partes verdes das plantas. Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCerdeira, Antonio LuizCole, A. WayneLuthe, Dawn S.Koch, Robert B.2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/13929Pesquisa Agropecuaria Brasileira; v.23, n.6, jun. 1988; 587-591Pesquisa Agropecuária Brasileira; v.23, n.6, jun. 1988; 587-5911678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/13929/7908info:eu-repo/semantics/openAccess2014-09-12T17:10:57Zoai:ojs.seer.sct.embrapa.br:article/13929Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-12T17:10:57Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Effect of glyphosate on lipoxygenase of cowpea seed
Efeito de glifosato em lipoxigenase de semente de caupi
title Effect of glyphosate on lipoxygenase of cowpea seed
spellingShingle Effect of glyphosate on lipoxygenase of cowpea seed
Cerdeira, Antonio Luiz
Vigna unguiculata; calcium; germination; plants
Vigna unguiculata; cálcio; germinação; plantas
title_short Effect of glyphosate on lipoxygenase of cowpea seed
title_full Effect of glyphosate on lipoxygenase of cowpea seed
title_fullStr Effect of glyphosate on lipoxygenase of cowpea seed
title_full_unstemmed Effect of glyphosate on lipoxygenase of cowpea seed
title_sort Effect of glyphosate on lipoxygenase of cowpea seed
author Cerdeira, Antonio Luiz
author_facet Cerdeira, Antonio Luiz
Cole, A. Wayne
Luthe, Dawn S.
Koch, Robert B.
author_role author
author2 Cole, A. Wayne
Luthe, Dawn S.
Koch, Robert B.
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Cerdeira, Antonio Luiz
Cole, A. Wayne
Luthe, Dawn S.
Koch, Robert B.
dc.subject.por.fl_str_mv Vigna unguiculata; calcium; germination; plants
Vigna unguiculata; cálcio; germinação; plantas
topic Vigna unguiculata; calcium; germination; plants
Vigna unguiculata; cálcio; germinação; plantas
description The predominant cowpea seed lipoxygenase was optimally activated by calcium at 0.68 mM and at pH 7.5. Seeds were analyzed during germinaton and showed a decrease in lipoxygenase specific activity with time. Seeds from plants treated with the herbicide glyphosate (N - (phosphonomethyl) glycine) showed a significant increase in lipoxygenase content. This could have been a result of senescence, or the effects of the herbicide on those plants. Such a conclusion is basead on findings that a. lipoxygenase, the activity of which was enhanced by glyphosate, has been reported to promote formation of 12-oxo-phytodienoic acid, and b. 12-oxo-phytodienoic acid has been proposed to be a precursor of jasmonic acid, a growth regulator which promotes senescence of plants. With the assay technique utilized, no lipoxygenase was found in mature leaves. 
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/13929
url https://seer.sct.embrapa.br/index.php/pab/article/view/13929
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/13929/7908
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.23, n.6, jun. 1988; 587-591
Pesquisa Agropecuária Brasileira; v.23, n.6, jun. 1988; 587-591
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
_version_ 1793416709891162112

Registros relacionados