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https://locus.ufv.br//handle/123456789/22257
Tipo: | Artigo |
Título: | Tolerance of Bradyrhizobium strains to glyphosate formulations |
Autor(es): | Santos, José Barbosa dos Ferreira, Evander Alves Ferreira a Kasuya, Maria Catarina M. Silva, Antonio Alberto da Procópio, Sergio de Oliveira |
Abstract: | Application of glyphosate to soybean plants, resistant to this herbicide, may be harmful to Bradyrhizobium, the symbiotic bacterium. This study compared the effect of two glyphosate commercial formulations, ZappQi® and Roundup Transorb® with the standard N-(phosphonomethyl) glycine on the growth of four Bradyrhizobium strains under laboratory conditions. Commercial formulations were applied at a concentration of 43.2 μg L−1 of a.e. and the strains were inoculated in yeast extract mannitol (YEM) broth used with or without a mixture of aromatics amino acids (phenylalanine, tyrosine, tryptophan). Herbicide effect on the growth of the Bradyrhizobium strains was assessed by optical density reading in a spectrophotometer. Roundup Transorb® had the biggest effects, probably, because of the presence of ethylamine as a surfactant. Pure glyphosate had minimal effects on Bradyrhizobium strains when aromatics amino acids have been added to YEM broth. Glyphosate application as Roundup Transorb® in the initial stage of soybean development may affect the nodulation process by Bradyrhizobium. |
Palavras-chave: | Adjuvant Adjuvant Aromatic amino acids Rhizobium Laboratory bioassay |
Editor: | Crop Protection |
Tipo de Acesso: | Elsevier Ltd. |
URI: | https://doi.org/10.1016/j.cropro.2004.10.007 http://www.locus.ufv.br/handle/123456789/22257 |
Data do documento: | Jan-2005 |
Aparece nas coleções: | Fitotecnia - Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | texto completo | 221,86 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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