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http://hdl.handle.net/20.500.12207/6064
Title: | Convergent adaptation of multiple herbicide resistance to auxin mimics and ALS- and EPSPS-Inhibitors in Brassica rapa from North and South America |
Authors: | Domínguez-Valenzuela, José Palma-Bautista, Candelario Vázquez-Garcia, José Yanniccari, Marcos Gigón, Ramón Alcántara-de la Cruz, Ricardo De Prado, Rafael Portugal, João |
Keywords: | ALS enzyme activity Ethylene production Herbicide tolerant crops Oilseed rape Resistant gene flow Shikimic acid accumulation |
Issue Date: | 26-May-2023 |
Publisher: | MDPI |
Citation: | Domínguez-Valenzuela, J. A., Palma-Bautista, C., Vázquez-Garcia, J. G., Yanniccari, M., Gigón, R., Alcántara-de la Cruz, R., De Prado, R., & Portugal, J. (2023). Convergent adaptation of multiple herbicide resistance to Auxin Mimics and ALSand EPSPS-Inhibitors in Brassica rapa from North and South America. Plants, 12(11), Article 2119. https://doi.org/10.3390/plants12112119 |
Abstract: | Herbicide-resistant weeds have been identified and recorded on every continent where croplands are available. Despite the diversity of weed communities, it is of interest how selection has led to the same consequences in distant regions. Brassica rapa is a widespread naturalized weed that is found throughout temperate North and South America, and it is a frequent weed among winter cereal crops in Argentina and in Mexico. Broadleaf weed control is based on glyphosate that is used prior to sowing and sulfonylureas or mimic auxin herbicides that are used once the weeds have already emerged. This study was aimed at determining whether a convergent phenotypic adaptation to multiple herbicides had occurred in B. rapa populations from Mexico and Argentina by comparing the herbicide sensitivity to inhibitors of the acetolactate synthase (ALS), 5-enolpyruvylshikimate-3- phosphate (EPSPS), and auxin mimics. Five B. rapa populations were analyzed from seeds collected in wheat fields in Argentina (Ar1 and Ar2) and barley fields in Mexico (Mx1, Mx2 and MxS). Mx1, Mx2, and Ar1 populations presented multiple resistance to ALS- and EPSPS-inhibitors and to auxin mimics (2,4-D, MCPA, and fluroxypyr), while the Ar2 population showed resistance only to ALSinhibitors and glyphosate. Resistance factors ranged from 947 to 4069 for tribenuron-methyl, from 1.5 to 9.4 for 2,4-D, and from 2.7 to 42 for glyphosate. These were consistent with ALS activity, ethylene production, and shikimate accumulation analyses in response to tribenuron-methyl, 2,4-D, and glyphosate, respectively. These results fully support the evolution of the multiple- and crossherbicide resistance to glyphosate, ALS-inhibitors, and auxinic herbicides in B. rapa populations from Mexico and Argentina. |
Peer reviewed: | yes |
URI: | https://hdl.handle.net/20.500.12207/6064 |
metadata.dc.identifier.doi: | https://doi.org/10.3390/plants12112119 |
ISSN: | 2223-7747 |
Appears in Collections: | D-BIO - Artigos em revistas indexadas à WoS/Scopus |
Files in This Item:
File | Description | Size | Format | |
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Convergent Adaptation of Multiple_JP_2023.pdf | 910.41 kB | Adobe PDF | View/Open |
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