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- Title
Divergence in Glyphosate Susceptibility between Steinchisma laxum Populations Involves a Pro106Ser Mutation.
- Authors
Hoyos, Veronica; Plaza, Guido; Palma-Bautista, Candelario; Vázquez-García, Jose G.; Dominguez-Valenzuela, José Alfredo; Alcántara-de la Cruz, Ricardo; De Prado, Rafael
- Abstract
The characterization of the mechanisms conferring resistance to herbicides in weeds is essential for developing effective management programs. This study was focused on characterizing the resistance level and the main mechanisms that confer resistance to glyphosate in a resistant (R) Steinchisma laxum population collected in a Colombian rice field in 2020. The R population exhibited 11.2 times higher resistance compared to a susceptible (S) population. Non-target site resistance (NTSR) mechanisms that reduced absorption and impaired translocation and glyphosate metabolism were not involved in the resistance to glyphosate in the R population. Evaluating the target site resistance mechanisms by means of enzymatic activity assays and EPSPS (5-enolpyruvylshikimate-3-phosphate synthase) gene sequencing, the mutation Pro106Ser was found in R plants of S. laxum. These findings are crucial for managing the spread of S. laxum resistance in Colombia. To effectively control S. laxum in the future, it is imperative that farmers use herbicides with different mechanisms of action in addition to glyphosate and adopt Integrate Management Programs to control weeds in rice fields of the central valleys of Colombia.
- Subjects
COLOMBIA; GLYPHOSATE; HERBICIDE resistance; WEED control for rice; PADDY fields; GENETIC mutation; HERBICIDES
- Publication
Plants (2223-7747), 2023, Vol 12, Issue 18, p3315
- ISSN
2223-7747
- Publication type
Article
- DOI
10.3390/plants12183315