Glyphosate applied at low doses can stimulate plant growth

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dc.contributor.authorVelini, Edivaldo Domingues [UNESP]
dc.contributor.authorAlves, Elza [UNESP]
dc.contributor.authorGodoy, Maria C. [UNESP]
dc.contributor.authorMeschede, Dana K. [UNESP]
dc.contributor.authorSouza, Reginaldo T.
dc.contributor.authorDuke, Stephen O.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUSDA
dc.date.accessioned2014-05-20T13:20:14Z
dc.date.available2014-05-20T13:20:14Z
dc.date.issued2008-04-01
dc.description.abstractBACKGROUND: Glyphosate blocks the shikimic acid pathway, inhibiting the production of aromatic amino acids and several secondary compounds derived from these amino acids. Non-target plants can be exposed to low doses of glyphosate by herbicide drift of spray droplets and contact with treated weeds. Previous studies have reported that low doses of glyphosate stimulate growth, although these data are very limited. The objective of this study was to determine the effects of low glyphosate doses on growth of a range of plant species.RESULTS: Growth of maize, conventional soybean, Eucalyptus grandis Hill ex Maiden, Pinus caribea L. and Commelia benghalensis L. was enhanced by 1.8-36 g glyphosate ha(-1). Growth of glyphosate-resistant soybean was unaffected by any glyphosate dose from 1.8 to 720 g AE ha(-1). The optimum doses for growth stimulation were distinct for plant species and tissue evaluated. The greatest stimulation of growth was observed for C. benghalensis and P. caribea. Shikimic acid levels in tissues of glyphosate-treated soybean and maize were measured and found to be elevated at growth-stimulating doses.CONCLUSION: Subtoxic doses of glyphosate stimulate the growth of a range of plant species, as measured in several plant organs. This hormesis effect is likely to be related to the molecular target of glyphosate, since the effect was not seen in glyphosate-resistant plants, and shikimate levels were enhanced in plants with stimulated growth. (c) 2008 Society of Chemical Industry.en
dc.description.affiliationSão Paulo State Univ, Fac Agron Sci, Expt Stn Lageado, Weed Sci Lab, BR-18603970 Botucatu, SP, Brazil
dc.description.affiliationSão Paulo State Univ, Fac Agron Sci, Registro, SP, Brazil
dc.description.affiliationUSDA, Nat Prod Utilizat Res Unit, University, MS 38677 USA
dc.description.affiliationUnespSão Paulo State Univ, Fac Agron Sci, Expt Stn Lageado, Weed Sci Lab, BR-18603970 Botucatu, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Fac Agron Sci, Registro, SP, Brazil
dc.format.extent489-496
dc.identifierhttp://dx.doi.org/10.1002/ps.1562
dc.identifier.citationPest Management Science. Chichester: John Wiley & Sons Ltd, v. 64, n. 4, p. 489-496, 2008.
dc.identifier.doi10.1002/ps.1562
dc.identifier.issn1526-498X
dc.identifier.lattes9855493448161702
dc.identifier.orcid0000-0003-0431-5942
dc.identifier.urihttp://hdl.handle.net/11449/5590
dc.identifier.wosWOS:000254497600023
dc.language.isoeng
dc.publisherJohn Wiley & Sons Ltd
dc.relation.ispartofPest Management Science
dc.relation.ispartofjcr3.249
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCommelia benghalensisen
dc.subjectEucalyptus grandisen
dc.subjectglyphosateen
dc.subjectgrowth stimulusen
dc.subjecthormesisen
dc.subjectmaizeen
dc.subjectPinus caribeaen
dc.subjectsoybeanen
dc.titleGlyphosate applied at low doses can stimulate plant growthen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderJohn Wiley & Sons Ltd
unesp.author.lattes9855493448161702[1]
unesp.author.orcid0000-0003-0431-5942[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias do Vale do Ribeira, Registropt
unesp.departmentEngenharia Agronômica - FCAVRpt

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