Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 65, Issue 34, Pages 7320-7327Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.7b01243
Keywords
johnsongrass; herbicide resistance; target-site resistance; enhanced metabolism; nicosulfuron
Funding
- Italian National Research Council (CNR)
- Syngenta Crop Protection
Ask authors/readers for more resources
Four Hungarian and two Italian Sorghum halepense populations harvested in maize fields were investigated to elucidate the levels and mechanisms underlying acetolactate synthase (ALS) inhibitors resistance. The two Italian populations were highly cross-resistant to all ALS inhibitors tested, and the variant ALS allele Leu(574) was identified in most of the plants; no differences were observed when the plants were treated with herbicide plus malathion. This suggests that the main resistance mechanism is target-site mediated. The Hungarian populations proved to be controlled by imazamox, while they were resistant to sulfonylureas and bispyribac-Na. All Hungarian populations, but not all plants of population 12-49H, presented the variant allele Glu(376). This is the first documented occurrence of the Asp-376-Glu substitution in S. halepense. ALS enzyme bioassay and treatment with malathion confirmed that at least in plants of two populations the resistance is very likely due to both target-site and enhanced metabolism of P450 enzymes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available