Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from Brazil
<i>Euphorbia heterophylla</i> is a species of weed that was previously controlled by fomesafen, imazamox and glyphosate, but continued use of these herbicides has selected resistant populations from the Rio Grande do Sul (Brazil). One resistant (R) strain and one susceptible (S) strain t...
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MDPI AG
2020-10-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/10/10/1573 |
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| author | Candelario Palma-Bautista Antonia M. Rojano-Delgado José G. Vázquez-García Marcos Yanniccari Rafael De Prado |
| author_facet | Candelario Palma-Bautista Antonia M. Rojano-Delgado José G. Vázquez-García Marcos Yanniccari Rafael De Prado |
| author_sort | Candelario Palma-Bautista |
| collection | DOAJ |
| description | <i>Euphorbia heterophylla</i> is a species of weed that was previously controlled by fomesafen, imazamox and glyphosate, but continued use of these herbicides has selected resistant populations from the Rio Grande do Sul (Brazil). One resistant (R) strain and one susceptible (S) strain to fomesafen, imazamox and glyphosate were compared, the latter by recurrent selection. Dose-response tests showed multiple resistance to these herbicides. The required imazamox concentration to inhibit ALS by 50% was approximately 16 times greater in the R population than in the S population. Based on the EPSPS activity results, the R population was 10 fold less sensitive to glyphosate than the S counterpart. In addition, basal EPSPS activity from R plants was 3.3 fold higher than the level detected on S plants. The Proto IX assays showed high resistance to fomesafen in the R population that accumulated less Proto IX than the S population. Malathion assays showed the participation of CytP450 in fomesafen resistance, but a molecular mechanism could also be involved. To our knowledge, this is the first characterisation of multiple resistance to these three groups of herbicides in <i>E. heterophylla</i> in the world. |
| first_indexed | 2024-03-10T15:36:23Z |
| format | Article |
| id | doaj.art-53ef433f96164fdead0b4ab467d6c8f7 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T15:36:23Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-53ef433f96164fdead0b4ab467d6c8f72023-11-20T17:13:59ZengMDPI AGAgronomy2073-43952020-10-011010157310.3390/agronomy10101573Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from BrazilCandelario Palma-Bautista0Antonia M. Rojano-Delgado1José G. Vázquez-García2Marcos Yanniccari3Rafael De Prado4Department of Agricultural Chemistry and Soil Sciences, University of Córdoba, 14014 Córdoba, SpainDepartment of Agricultural Chemistry and Soil Sciences, University of Córdoba, 14014 Córdoba, SpainDepartment of Agricultural Chemistry and Soil Sciences, University of Córdoba, 14014 Córdoba, SpainChacra Experimental Integrada Barrow (MAIBA—INTA), National Scientific and Technical Research Council, Tres Arroyos 7500, ArgentinaDepartment of Agricultural Chemistry and Soil Sciences, University of Córdoba, 14014 Córdoba, Spain<i>Euphorbia heterophylla</i> is a species of weed that was previously controlled by fomesafen, imazamox and glyphosate, but continued use of these herbicides has selected resistant populations from the Rio Grande do Sul (Brazil). One resistant (R) strain and one susceptible (S) strain to fomesafen, imazamox and glyphosate were compared, the latter by recurrent selection. Dose-response tests showed multiple resistance to these herbicides. The required imazamox concentration to inhibit ALS by 50% was approximately 16 times greater in the R population than in the S population. Based on the EPSPS activity results, the R population was 10 fold less sensitive to glyphosate than the S counterpart. In addition, basal EPSPS activity from R plants was 3.3 fold higher than the level detected on S plants. The Proto IX assays showed high resistance to fomesafen in the R population that accumulated less Proto IX than the S population. Malathion assays showed the participation of CytP450 in fomesafen resistance, but a molecular mechanism could also be involved. To our knowledge, this is the first characterisation of multiple resistance to these three groups of herbicides in <i>E. heterophylla</i> in the world.https://www.mdpi.com/2073-4395/10/10/1573<i>Euphorbia heterophylla</i>fomesafenimazamoxglyphosatemultiple resistanceNTSR mechanisms |
| spellingShingle | Candelario Palma-Bautista Antonia M. Rojano-Delgado José G. Vázquez-García Marcos Yanniccari Rafael De Prado Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from Brazil Agronomy <i>Euphorbia heterophylla</i> fomesafen imazamox glyphosate multiple resistance NTSR mechanisms |
| title | Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from Brazil |
| title_full | Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from Brazil |
| title_fullStr | Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from Brazil |
| title_full_unstemmed | Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from Brazil |
| title_short | Resistance to Fomesafen, Imazamox and Glyphosate in <i>Euphorbia heterophylla</i> from Brazil |
| title_sort | resistance to fomesafen imazamox and glyphosate in i euphorbia heterophylla i from brazil |
| topic | <i>Euphorbia heterophylla</i> fomesafen imazamox glyphosate multiple resistance NTSR mechanisms |
| url | https://www.mdpi.com/2073-4395/10/10/1573 |
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