Resistance to AHAS-inhibiting Herbicides in Weeds

Studies have shown that AHAS resistance-conferring mutations can have subtle effects on plant growth and development, but they do not consistently reduce plant fitness. For example, the catalytic efficiencies of AHAS enzymes isolated from both resistant and susceptible biotypes of L. serriola, K. scoparia, S. iberica, S. media, and L. perenne have been shown to be virtually identical [71, 73]. 

In weed biotypes where the mechanism of evolved resistance has been 

Despite the evolution of resistance to AHAS-inhibiting herbicides, these products are still among the most efficacious and widely used weed control agents in the world [72]. Commercial AHAS-inhibiting herbicides accounted for approxi- 

Biochem. Mol. Biol., 2000, 33, 1-36. Duggleby, R. G., Guddat, L W., Pang, S. S., Structure and Properties of Acetohydroxyacid Synthase in Thiamine Catalytic Mechanisms in Normal and Disease States, Vol. 11, 

33 Beyer, E. M., Duffy, M. J., Hay, J. V, Schlueter, D. D. Sulfonylureas in Herbicides Chemistry, D radation, and Mode of Action, Marcel Dekker, 

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