Increased auxin levels in root primordia are important controlling branching, while their interaction with abscisic acid (ABA) likely regulates lateral development water-deficient plants. The role of ABA accumulation regulating branching was investigated using immunolocalization to detect (indoleacetic acid, IAA) and (abscisic acid) the ABA-deficient barley mutant Az34 its parental genotype (cv...