ALS — Oryza sativa Indica Group

Summary

BGIOSGA008288 (OiALS) on chromosome 2 of indica rice encodes an acetolactate synthase, a thiamine pyrophosphate-dependent enzyme that also exhibits 2-hydroxyacyl-CoA lyase and pyruvate decarboxylase activities. The gene is associated with branched-chain amino acid biosynthesis, particularly valine and isoleucine anabolism, as well as fatty acid alpha-oxidation. It localises to the chloroplast stroma and the acetolactate synthase complex. OiALS is associated with response to herbicide, and specific alleles are linked to imidazolinone herbicide tolerance, herbicide tolerance, and aluminum resistance. Studies of related acetolactate synthase genes in other species connect the family to herbicide resistance, plant growth and development traits including tiller number, plant height, grain yield, and drought tolerance.