First Case of Glyphosate Resistance in <i>Bromus catharticus</i> Vahl.: Examination of Endowing Resistance Mechanisms

<i>Bromus catharticus</i> Vahl. has been used as a valuable forage crop, but it has also been noted as a weed of winter crops and an invader in several countries. In Argentina, a putative glyphosate-resistant population of <i>B. catharticus</i> was identified as a consequence...

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Autores principales: Yanniccari, Marcos Ezequiel, Vázquez García, José G., Gómez Lobato, María Eugenia, Rojano Delgado, Antonia M., Costa Aguiar Alves, Pedro Luis da, De Prado, Rafael
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Agrarias
Brome
EPSPS gene
shikimate
glyphosate absorption
glyphosate translocation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124758
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124758
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Brome
EPSPS gene
shikimate
glyphosate absorption
glyphosate translocation
spellingShingle Ciencias Agrarias
Brome
EPSPS gene
shikimate
glyphosate absorption
glyphosate translocation
Yanniccari, Marcos Ezequiel
Vázquez García, José G.
Gómez Lobato, María Eugenia
Rojano Delgado, Antonia M.
Costa Aguiar Alves, Pedro Luis da
De Prado, Rafael
First Case of Glyphosate Resistance in <i>Bromus catharticus</i> Vahl.: Examination of Endowing Resistance Mechanisms
topic_facet Ciencias Agrarias
Brome
EPSPS gene
shikimate
glyphosate absorption
glyphosate translocation
description <i>Bromus catharticus</i> Vahl. has been used as a valuable forage crop, but it has also been noted as a weed of winter crops and an invader in several countries. In Argentina, a putative glyphosate-resistant population of <i>B. catharticus</i> was identified as a consequence of the lack of effective control with glyphosate in the pre-sowing of wheat. Plant survival and shikimate accumulation analysis demonstrated a lower glyphosate-sensitivity of this population in comparison to a susceptible <i>B. catharticus</i> population. The resistant population was 4-fold more resistant to glyphosate than its susceptible counterpart. There was no evidence of target-site mechanisms of glyphosate resistance or an enhanced capacity to metabolize glyphosate in the resistant population. However, the resistant plants showed a lower foliar retention of glyphosate (138.34 µL solution g⁻¹ dry weight versus 390.79 µL solution g⁻¹ dry weight), a reduced absorption of ¹⁴C-glyphosate (54.18 % versus 73.56 %) and lower translocation of ¹⁴C-glyphosate from the labelled leaf (27.70 % versus 62.36 %). As a result, susceptible plants accumulated a 4.1-fold higher concentration of ¹⁴C-glyphosate in the roots compared to resistant plants. The current work describes the first worldwide case of glyphosate resistance in <i>B. catharticus</i>. A reduced foliar retention of herbicide, a differential rate of glyphosate entry into leaves and an altered glyphosate translocation pattern would be the most likely mechanisms of glyphosate exclusion.
format Articulo
Articulo
author Yanniccari, Marcos Ezequiel
Vázquez García, José G.
Gómez Lobato, María Eugenia
Rojano Delgado, Antonia M.
Costa Aguiar Alves, Pedro Luis da
De Prado, Rafael
author_facet Yanniccari, Marcos Ezequiel
Vázquez García, José G.
Gómez Lobato, María Eugenia
Rojano Delgado, Antonia M.
Costa Aguiar Alves, Pedro Luis da
De Prado, Rafael
author_sort Yanniccari, Marcos Ezequiel
title First Case of Glyphosate Resistance in <i>Bromus catharticus</i> Vahl.: Examination of Endowing Resistance Mechanisms
title_short First Case of Glyphosate Resistance in <i>Bromus catharticus</i> Vahl.: Examination of Endowing Resistance Mechanisms
title_full First Case of Glyphosate Resistance in <i>Bromus catharticus</i> Vahl.: Examination of Endowing Resistance Mechanisms
title_fullStr First Case of Glyphosate Resistance in <i>Bromus catharticus</i> Vahl.: Examination of Endowing Resistance Mechanisms
title_full_unstemmed First Case of Glyphosate Resistance in <i>Bromus catharticus</i> Vahl.: Examination of Endowing Resistance Mechanisms
title_sort first case of glyphosate resistance in <i>bromus catharticus</i> vahl.: examination of endowing resistance mechanisms
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/124758
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