title: Trichomes: different regulatory networks lead to convergent structures.
abstract: Sometimes, proteins, biological structures or even organisms have similar functions and appearances but have evolved through widely divergent pathways. There is experimental evidence to suggest that different developmental pathways have converged to produce similar outgrowths of the aerial plant epidermis, referred to as trichomes. The emerging picture suggests that trichomes in Arabidopsis thaliana and, perhaps, in cotton develop through a transcriptional regulatory network that differs from those regulating trichome formation in Antirrhinum and Solanaceous species. Several lines of evidence suggest that the duplication of a gene controlling anthocyanin production and subsequent divergence might be the major force driving trichome formation in Arabidopsis, whereas the multicellular trichomes of Antirrhinum and Solanaceous species appear to have a different regulatory origin.
authors.affiliation: Environmental Sciences Faculty, University of Castilla-La Mancha, 45071 Toledo, Spain. laura.serna@uclm.es
authors.forename: Laura
authors.initials: L
authors.lastname: Serna
authors.forename: Cathie
authors.initials: C
authors.lastname: Martin
mesh_terms: D000872:Anthocyanins / Q000096:biosynthesis; D032161:Antirrhinum / Q000235:genetics / Q000254:growth & development; D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development*; D029681:Arabidopsis Proteins; D003368:Gossypium / Q000235:genetics / Q000254:growth & development; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D020598:Proto-Oncogene Proteins c-myb / Q000235:genetics*; D050436:Regulatory Elements, Transcriptional / Q000235:genetics* / Q000502:physiology*; D019657:Solanaceae / Q000235:genetics / Q000254:growth & development
chemical_list: C511988:ATR1 protein, Arabidopsis; D000872:Anthocyanins; D029681:Arabidopsis Proteins; C511989:CPC protein, Arabidopsis; D010940:Plant Proteins; D020598:Proto-Oncogene Proteins c-myb