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This work was funded by the Asociacion de Agroquimicos y Medioambiente and the Universidad Autonoma Chapingo.
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Vazquez-Garcia, Jose GuadalupeAuthorNon-Target Site Mechanisms Endow Resistance to Glyphosate in Saltmarsh Aster (Aster squamatus)
Publicated to:Plants-Basel. 10 (9): 1970- - 2021-09-01 10(9), DOI: 10.3390/plants10091970
Authors: Dominguez-Valenzuela, Jose Alfredo; de la Cruz, Ricardo; Palma-Bautista, Candelario; Vazquez-Garcia, Jose Guadalupe; Cruz-Hipolito, Hugo E; De Prado, Rafael
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Abstract
Of the six-glyphosate resistant weed species reported in Mexico, five were found in citrus groves. Here, the glyphosate susceptibility level and resistance mechanisms were evaluated in saltmarsh aster (Aster squamatus), a weed that also occurs in Mexican citrus groves. The R population accumulated 4.5-fold less shikimic acid than S population. S plants hardly survived at 125 g ae ha(-1) while most of the R plants that were treated with 1000 g ae ha(-1), which suffered a strong growth arrest, showed a vigorous regrowth from the third week after treatment. Further, 5-enolpyruvylshikimate-3-phosphate basal and enzymatic activities did not diverge between populations, suggesting the absence of target-site resistance mechanisms. At 96 h after treatment, R plants absorbed similar to 18% less glyphosate and maintained 63% of the C-14-glyphsoate absorbed in the treated leaf in comparison to S plants. R plants metabolized twice as much (72%) glyphosate to amino methyl phosphonic acid and glyoxylate as the S plants. Three non-target mechanisms, reduced absorption and translocation and increased metabolism, confer glyphosate resistance saltmarsh aster. This is the first case of glyphosate resistance recorded for A. squamatus in the world.
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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, 2021, it was in position 39/239, 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: 1.63, 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 2025-07-10, the following number of citations:
- WoS: 5
- Scopus: 7
- Europe PMC: 1
Impact and social visibility
Leadership analysis of institutional authors
This work has been carried out with international collaboration, specifically with researchers from: Brazil; Mexico.