title: Root hairs, trichomes and the evolution of duplicate genes.
abstract: The MYB-class proteins WEREWOLF and GLABRA1 are functionally interchangeable, even though one is normally expressed solely in roots and the other only in shoots. This shows that their different functions are the result of the modification of cis-regulatory sequences over evolutionary time. The two genes thus provide an example of morphological diversification created by gene duplication and changes in regulation.
authors.affiliation: University of Missouri-St Louis, 8001 Natural Bridge Road, St Louis, MO 63121, USA. tkellogg@umsl.edu
authors.forename: E A
authors.initials: EA
authors.lastname: Kellogg
mesh_terms: D029681:Arabidopsis Proteins; D005075:Biological Evolution; D004268:DNA-Binding Proteins / Q000235:genetics; D020440:Gene Duplication; D017343:Genes, Plant; D008957:Models, Genetic; D010940:Plant Proteins / Q000235:genetics; D018517:Plant Roots / Q000166:cytology / Q000235:genetics*; D018520:Plant Shoots / Q000166:cytology / Q000235:genetics*
chemical_list: D029681:Arabidopsis Proteins; D004268:DNA-Binding Proteins; D010940:Plant Proteins; C402111:WER protein, Arabidopsis; C071556:GL1 protein, Arabidopsis