Genomic and Functional Characterization of Acetolactate Synthase (ALS) Genes in Stress Adaptation of the Noxious Weed <i>Amaranthus palmeri</i>.

ABSTRACT: Acetolactate synthase (ALS) is an important enzyme in plant branched-chain amino acid biosynthesis and the target of several major herbicide classes. Despite its agronomic importance, the role of ALS genes in stress adaptation in the invasive weed Amaranthus palmeri remains unstudied. In this study, four ApALS genes with high motif conservation were identified and analyzed in A. palmeri. Phylogenetic analysis classified ApALS and other plant ALS proteins into two distinct clades, and the ApALS proteins were predicted to localize to the chloroplast. Gene expression analysis demonstrated that ApALS genes are responsive to multiple stresses, including salt, heat, osmotic stress, glufosinate ammonium, and the ALS-inhibiting herbicide imazethapyr, suggesting roles in

SUBMITTER: Ren J 

PROVIDER: S-EPMC12526137 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature