Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina
In Argentina, glyphosate resistance was reported in a Lolium perenne population after 12 years of successful herbicide use. The aim of the current paper was to put in evidence for the mechanism of glyphosate resistance of this weed. Susceptible leaves treated with different doses of glyphosate and i...
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
2018
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fevo.2017.00123/full http://hdl.handle.net/20.500.12123/2347 https://doi.org/10.3389/fevo.2017.00123 |
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| author | Yanniccari, Marcos Ezequiel Gómez Lobato, María Eugenia Istilart, Carolina Maria Natalucci, Claudia Gimenez, Daniel Oscar Castro, Ana Maria |
| author_browse | Castro, Ana Maria Gimenez, Daniel Oscar Gómez Lobato, María Eugenia Istilart, Carolina Maria Natalucci, Claudia Yanniccari, Marcos Ezequiel |
| author_facet | Yanniccari, Marcos Ezequiel Gómez Lobato, María Eugenia Istilart, Carolina Maria Natalucci, Claudia Gimenez, Daniel Oscar Castro, Ana Maria |
| author_sort | Yanniccari, Marcos Ezequiel |
| collection | INTA Digital |
| description | In Argentina, glyphosate resistance was reported in a Lolium perenne population after 12 years of successful herbicide use. The aim of the current paper was to put in evidence for the mechanism of glyphosate resistance of this weed. Susceptible leaves treated with different doses of glyphosate and incubated in vitro showed an accumulation of shikimic acid of around three to five times the basal level, while no changes were detected in leaves of glyphosate-resistant plants. The resistance mechanism prevents shikimate accumulation in leaves, even under such tissue-isolation conditions. The activity of the glyphosate target enzyme (EPSPS: 5-enolpyruvylshikimate-3-phosphate synthase) was quantified at different herbicide concentrations. EPSPS from resistant plants showed no difference in glyphosate-sensitivity compared to EPSPS from susceptible plants, and, accordingly, no amino acid substitution causing mutations associated with resistance were found. While the glyphosate target enzymes were equally sensitive, the basal EPSPS activity in glyphosate resistant plants was approximately 3-fold higher than the EPSPS activity in susceptible plants. This increased EPSPS activity in glyphosate resistant plants was associated with a 15-fold higher expression of EPSPS compared with susceptible plants. Therefore, the over-expression of EPSPS appears to be the main mechanism responsible for resistance to glyphosate. This mechanism has a constitutive character and has important effects on plant fitness, as recently reported. |
| format | Artículo |
| id | INTA2347 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA23472018-05-08T13:14:59Z Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina Yanniccari, Marcos Ezequiel Gómez Lobato, María Eugenia Istilart, Carolina Maria Natalucci, Claudia Gimenez, Daniel Oscar Castro, Ana Maria Lolium Perenne Herbicidas Resistencia a los Herbicidas Glifosato Herbicides Resistance to Herbicides Glyphosate Raigras perenne Argentina In Argentina, glyphosate resistance was reported in a Lolium perenne population after 12 years of successful herbicide use. The aim of the current paper was to put in evidence for the mechanism of glyphosate resistance of this weed. Susceptible leaves treated with different doses of glyphosate and incubated in vitro showed an accumulation of shikimic acid of around three to five times the basal level, while no changes were detected in leaves of glyphosate-resistant plants. The resistance mechanism prevents shikimate accumulation in leaves, even under such tissue-isolation conditions. The activity of the glyphosate target enzyme (EPSPS: 5-enolpyruvylshikimate-3-phosphate synthase) was quantified at different herbicide concentrations. EPSPS from resistant plants showed no difference in glyphosate-sensitivity compared to EPSPS from susceptible plants, and, accordingly, no amino acid substitution causing mutations associated with resistance were found. While the glyphosate target enzymes were equally sensitive, the basal EPSPS activity in glyphosate resistant plants was approximately 3-fold higher than the EPSPS activity in susceptible plants. This increased EPSPS activity in glyphosate resistant plants was associated with a 15-fold higher expression of EPSPS compared with susceptible plants. Therefore, the over-expression of EPSPS appears to be the main mechanism responsible for resistance to glyphosate. This mechanism has a constitutive character and has important effects on plant fitness, as recently reported. EEA Barrow Fil: Yanniccari, Marcos Ezequiel. Instituto Nacional de Tecnología Agropecuaria (INTA). Chacra Experimental Integrada Barrow; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gómez Lobato, María Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina Fil: Istilart, Carolina Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Chacra Experimental Integrada Barrow; Argentina Fil: Natalucci, Claudia. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación de Proteínas Vegetales (CIPROVE); Argentina Fil: Gimenez, Daniel Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina Fil: Castro, Ana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; Argentina 2018-05-08T13:14:03Z 2018-05-08T13:14:03Z 2017-10 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.frontiersin.org/articles/10.3389/fevo.2017.00123/full http://hdl.handle.net/20.500.12123/2347 2296-701X https://doi.org/10.3389/fevo.2017.00123 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Frontiers in Ecology and Evolution 5 : 123. (October 2017) |
| spellingShingle | Lolium Perenne Herbicidas Resistencia a los Herbicidas Glifosato Herbicides Resistance to Herbicides Glyphosate Raigras perenne Argentina Yanniccari, Marcos Ezequiel Gómez Lobato, María Eugenia Istilart, Carolina Maria Natalucci, Claudia Gimenez, Daniel Oscar Castro, Ana Maria Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina |
| title | Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina |
| title_full | Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina |
| title_fullStr | Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina |
| title_full_unstemmed | Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina |
| title_short | Mechanism of Resistance to Glyphosate in Lolium perenne from Argentina |
| title_sort | mechanism of resistance to glyphosate in lolium perenne from argentina |
| topic | Lolium Perenne Herbicidas Resistencia a los Herbicidas Glifosato Herbicides Resistance to Herbicides Glyphosate Raigras perenne Argentina |
| url | https://www.frontiersin.org/articles/10.3389/fevo.2017.00123/full http://hdl.handle.net/20.500.12123/2347 https://doi.org/10.3389/fevo.2017.00123 |
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