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The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe
Six Johnsongrass populations suspected of being glyphosate resistant were collected from railways and freeways near Cordoba (SW Spain), where glyphosate is the main weed control tool. The 50% reduction in shoot fresh weight (GR(50)) values obtained for these six populations ranged from 550.4 to 1169...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7154863/ https://www.ncbi.nlm.nih.gov/pubmed/32138144 http://dx.doi.org/10.3390/plants9030313 |
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author | Vazquez-Garcia, Jose G. Palma-Bautista, Candelario Rojano-Delgado, Antonia Maria De Prado, Rafael Menendez, Julio |
author_facet | Vazquez-Garcia, Jose G. Palma-Bautista, Candelario Rojano-Delgado, Antonia Maria De Prado, Rafael Menendez, Julio |
author_sort | Vazquez-Garcia, Jose G. |
collection | PubMed |
description | Six Johnsongrass populations suspected of being glyphosate resistant were collected from railways and freeways near Cordoba (SW Spain), where glyphosate is the main weed control tool. The 50% reduction in shoot fresh weight (GR(50)) values obtained for these six populations ranged from 550.4 to 1169 g ae ha(−1), which were 4.2 to 9 times greater than the value obtained for the susceptible population. Glyphosate was equally metabolized to the same extent in both resistant and susceptible populations, with no significant differences in either 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) inhibition or basal activity. No amino acid substitutions were observed in any of the resistant populations. Slight but significant differences in glyphosate penetration were observed among some but not all of the resistant populations and for the times of incubation assayed, although these differences were not considered further. The proposed primary mechanism of resistance in these six glyphosate-resistant Johnsongrass populations is reduced herbicide translocation, because the amount of glyphosate that translocated from treated leaves to shoots and roots in the susceptible population was double that observed in the resistant populations. As glyphosate multiple resistance due to more than one mechanism is not uncommon, this is the first time that glyphosate-resistant Johnsongrass populations have been fully described for all known mechanisms. |
format | Online Article Text |
id | pubmed-7154863 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-71548632020-04-21 The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe Vazquez-Garcia, Jose G. Palma-Bautista, Candelario Rojano-Delgado, Antonia Maria De Prado, Rafael Menendez, Julio Plants (Basel) Article Six Johnsongrass populations suspected of being glyphosate resistant were collected from railways and freeways near Cordoba (SW Spain), where glyphosate is the main weed control tool. The 50% reduction in shoot fresh weight (GR(50)) values obtained for these six populations ranged from 550.4 to 1169 g ae ha(−1), which were 4.2 to 9 times greater than the value obtained for the susceptible population. Glyphosate was equally metabolized to the same extent in both resistant and susceptible populations, with no significant differences in either 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) inhibition or basal activity. No amino acid substitutions were observed in any of the resistant populations. Slight but significant differences in glyphosate penetration were observed among some but not all of the resistant populations and for the times of incubation assayed, although these differences were not considered further. The proposed primary mechanism of resistance in these six glyphosate-resistant Johnsongrass populations is reduced herbicide translocation, because the amount of glyphosate that translocated from treated leaves to shoots and roots in the susceptible population was double that observed in the resistant populations. As glyphosate multiple resistance due to more than one mechanism is not uncommon, this is the first time that glyphosate-resistant Johnsongrass populations have been fully described for all known mechanisms. MDPI 2020-03-03 /pmc/articles/PMC7154863/ /pubmed/32138144 http://dx.doi.org/10.3390/plants9030313 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Vazquez-Garcia, Jose G. Palma-Bautista, Candelario Rojano-Delgado, Antonia Maria De Prado, Rafael Menendez, Julio The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe |
title | The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe |
title_full | The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe |
title_fullStr | The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe |
title_full_unstemmed | The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe |
title_short | The First Case of Glyphosate Resistance in Johnsongrass (Sorghum halepense (L.) Pers.) in Europe |
title_sort | first case of glyphosate resistance in johnsongrass (sorghum halepense (l.) pers.) in europe |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7154863/ https://www.ncbi.nlm.nih.gov/pubmed/32138144 http://dx.doi.org/10.3390/plants9030313 |
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