English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The good understanding of the mechanisms of resistance to herbicides in weeds is a necessity to implement sustainable weed management strategies. Here, a study was conducted to characterize the molecular bases of resistance to acetyl coenzyme A carboxylase (ACCase) and acetolactate synthase (ALS) inhibiting herbicides in Lolium rigidum populations from Tunisia. Nine Lolium rigidum (ryegrass) populations collected in wheat fields from Northern Tunisia were investigated for their resistance to two ACCase-inhibiting herbicides and an ALS-inhibiting herbicide. All populations were tested in the greenhouse in pots using the commercial dose to determine resistance status. Survival plants were also tested for the presence of two ACCase (L1781 and N2041) and two ALS (P197 and W574) mutant resistant alleles using molecular markers. Resistance to ACCase-inhibiting herbicides was found in all tested populations. Comparison of the results from herbicide sensitivity bioassays with genotyping indicated that more than 80% of the plants resistant to ACC-inhibiting herbicides would be resistant via increased herbicide metabolism. However, ALS-inhibiting herbicides are still more or less controlling ACCase resistant populations, so indicating that the selection process of resistance is ongoing. Target-site resistance appears to be the major mechanism for these early cases of ALS inhibitor resistance. This study reported the first case of resistance to ALS-inhibiting herbicides in ryegrass in Tunisia, and investigated the molecular bases of this resistance. It establishes the clear importance of non target-site resistance to ACCaseand/or ALS-inhibiting herbicides.

Multiple Resistance to Acetyl Coenzyme A Carboxylase and Acetolactate Synthase Inhibiting Herbicides in Tunisian Ryegrass Populations (Lolium rigidum)