title: MAIL1 is essential for development of the primary root but not of anchor roots.
abstract: MAIN-LIKE1 (MAIL1) is a ubiquitously expressed nuclear protein, which has a crucial function during root development. We have recently described loss of function mutants for MAIL1, in which the organization and function of the primary root meristem is lost soon after germination. Moreover cell differentiation is impaired resulting in primary root growth arrest soon after emergence. Here we show that mail1 mutants form several anchor roots from the hypocotyl to root junction. These anchor roots show similar defects in the organization of the stem cell niche as the primary root. In contrast, differentiation processes are not impaired and thus anchor roots seem to be able to compensate for the loss of primary root function. Our data show that MAIL1 is essential for specification of cell fate in the primary root but not in anchor roots.
authors.affiliation: a Molekulare Pflanzenphysiologie and Erlangen Center of Plant Science (ECROPS) ; Friedrich- Alexander Universität Erlangen-Nürnberg ; Erlangen , Germany.
authors.forename: Christine
authors.initials: C
authors.lastname: Ühlken
authors.forename: Stefan
authors.initials: S
authors.lastname: Hoth
authors.forename: Magdalena
authors.initials: M
authors.lastname: Weingartner
mesh_terms: D017360:Arabidopsis / Q000254:growth & development* / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000378:metabolism*; D009154:Mutation / Q000235:genetics; D009687:Nuclear Proteins / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development* / Q000378:metabolism*; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; C000600869:MAIL1 protein, Arabidopsis; D009687:Nuclear Proteins
keywords: anchor root; arabidopsis; differentiation; primary root; root development