Background: A Lolium rigidum population collected from Western Australia was previously reported as highly resistant to dinitroaniline herbicides mainly due to a Val-202-Phe substitution in the target site α-tubulin protein. To further determine the contribution of the 202 mutation to resistance, two sub-populations, respectively comprising the 202 mutant and wild-type (WT) individuals, were isolated from within the same resistant population and subject to dinitroaniline herbicide doses. A rice transgenic study was conducted to demonstrate whether the amino acid substitution at the 202 residue confers resistance. In addition, as indicated in the phenotyping and genotyping study, non-target enhanced trifluralin metabolism was further examined in the same population.
Results: The 202 mutants were more resistant than the wild-type plants. Rice calli transformed with the L. rigidum mutant α-tubulin gene (Val-202-Phe) were more resistant to dinitroaniline herbicides relative to calli transformed with the wild-type gene. Also, enhanced trifluralin metabolism was detected in the 202 mutants in comparison to the susceptible seedlings.
Conlcusion: Both target-site Val-202-Phe α-tubulin mutation and non-target-site enhanced trifluralin metabolism co-exist in this dinitroaniline-resistant L. rigidum population. © 2019 Society of Chemical Industry.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/ps.5561 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Interactions between prosulfocarb and trifluralin metabolism in annual ryegrass (Lolium rigidum).
Pest Manag Sci
October 2024
Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, Crawley, WA, Australia.
Article Synopsis
- Some types of ryegrass in Australia are becoming resistant to certain herbicides that are used to control weeds.
- Researchers found that different parts of the ryegrass plants react differently to these herbicides.
- It's important to choose the right herbicide mixtures carefully to prevent the ryegrass from becoming resistant to even more types of herbicides.
Diversity of ecotypes of five species of ryegrass from Northwestern Spain by phenotypic traits and microsatellites.
BMC Plant Biol
August 2024
Department of Crop Production and Engineering Projects, Campus Terra, Universidade de Santiago de Compostela, Lugo, 27002, Spain.
Background: The Agricultural Research Centre of Mabegondo (Xunta de Galicia, A Coruña, Spain) conserves one of the most important collections of phytogenetic resources of ecotypes and natural populations of grassland species from northwestern Spain, among them populations of ryegrass (Lolium spp.), one of the most cultivated forage grasses in the world. The objective of the present study was to evaluate the diversity among commercial cultivars and natural ryegrass populations with phenotypic traits and molecular markers.
View Article and Find Full Text PDFAn intronless tau class glutathione transferase detoxifies several herbicides in flufenacet-resistant ryegrass.
Plant Physiol
October 2024
Executive Department, Senior Scientist Consultant, Liederbach 65835, Germany.
Resistance to preemergence herbicides, e.g. inhibitors of the biosynthesis of very-long-chain fatty acids (VLCFAs), is evolving in response to increased use of these compounds.
View Article and Find Full Text PDFInsight into the herbicide resistance patterns in populations in Tunisian and Moroccan wheat regions.
Front Plant Sci
February 2024
Department of Agroecology and Crop Production, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia.
Rigid ryegrass ( Gaud.) is one of the most troublesome weeds in Moroccan and Tunisian cereal crop fields. In total, 19 rigid ryegrass field populations were randomly selected in northern wheat crop areas of Morocco and Tunisia to examine the patterns of herbicide resistance to acetolactate synthase (ALS)- and acetyl-CoA carboxylase (ACCase)-inhibiting herbicides.
View Article and Find Full Text PDFPyroxasulfone Metabolism in Resistant : Is It All Down to GST Activity?
J Agric Food Chem
February 2024
Australian Herbicide Resistance Initiative, School of Agriculture and Environment, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia.
Resistance to the herbicide pyroxasulfone has slowly but steadily increased in agricultural weeds. The evolved resistance of one population has been attributed to the conjugation of pyroxasulfone to reduced glutathione, mediated by glutathione transferase (GST) activity. To determine if GST-based metabolism is a widespread mechanism of pyroxasulfone resistance in , a number of putative-resistant populations were screened for GST activity toward pyroxasulfone, the presence of GSTF13-like isoforms (previously implicated in pyroxasulfone conjugation in this species), tissue glutathione concentrations, and response to inhibitors of GSTs and oxygenases.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!