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This research was funded by the Asociacion de Agroquimicos y Medio Ambiente (Spain). Alcantara-de la Cruz acknowledges the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (Scholarship: 105187/2023-2).
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Vazquez-Garcia, Jose GAuthorConvergent Adaptation of Multiple Herbicide Resistance to Auxin Mimics and ALS- and EPSPS-Inhibitors in Brassica rapa from North and South America
Publicated to:Plants-Basel. 12 (11): 2119- - 2023-05-26 12(11), DOI: 10.3390/plants12112119
Authors: Dominguez-Valenzuela, Jose Alfredo; Palma-Bautista, Candelario; Vazquez-Garcia, Jose G; Yanniccari, Marcos; Gigon, Ramon; Alcantara-de la Cruz, Ricardo; De Prado, Rafael; Portugal, Joao
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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 ALS-inhibitors 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 cross-herbicide resistance to glyphosate, ALS-inhibitors, and auxinic herbicides in B. rapa populations from Mexico and Argentina.
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Bibliometric impact. Analysis of the contribution and dissemination channel
The work has been published in the journal Plants-Basel due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2023, it was in position 46/265, thus managing to position itself as a Q1 (Primer Cuartil), in the category Plant Sciences.
From a relative perspective, and based on the normalized impact indicator calculated from the Field Citation Ratio (FCR) of the Dimensions source, it yields a value of: 1.45, which indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: Dimensions Jul 2025)
Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-07-09, the following number of citations:
- WoS: 2
- Scopus: 2
- Europe PMC: 1
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Leadership analysis of institutional authors
This work has been carried out with international collaboration, specifically with researchers from: Argentina; Brazil; Mexico; Portugal.