Molecular Basis of Herbicide Resistance in Plants in Amaranthus hybridus

Abstract
Resistance of different species of weeds to s -triazines, a commonly used class of herbicides, has been shown to involve a change in the binding affinity of the herbicide to a chloroplast polypeptide of 32,000 daltons. A single amino acid difference in this 32,000-dalton protein appears to be responsible for resistance to the herbicide in Amaranthus hybridus .