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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/5590
Título: 
Glyphosate applied at low doses can stimulate plant growth
Autor(es): 
Instituição: 
  • Universidade Estadual Paulista (UNESP)
  • USDA
ISSN: 
1526-498X
Resumo: 
BACKGROUND: 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.
Data de publicação: 
1-Abr-2008
Citação: 
Pest Management Science. Chichester: John Wiley & Sons Ltd, v. 64, n. 4, p. 489-496, 2008.
Duração: 
489-496
Publicador: 
John Wiley & Sons Ltd
Palavras-chaves: 
  • Commelia benghalensis
  • Eucalyptus grandis
  • glyphosate
  • growth stimulus
  • hormesis
  • maize
  • Pinus caribea
  • soybean
Fonte: 
http://dx.doi.org/10.1002/ps.1562
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/5590
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