Coates J. C. auteur aut IRD Laplaze L. auteur aut IRD Haseloff J. auteur aut IRD text journalArticle eng text/pdf reformatted digital access lArmadillo/beta-catenin and related proteins have important functions during animal and Dictyostelium development, regulating cell differentiation, proliferation, and adhesion. Armadillo-repeat-containing proteins also exist in plants, but the majority have unknown roles. The Arabidopsis genes that show greatest sequence homology to Armadillo/beta-catenin are called ARABIDILLO-1 and -2. Here, we demonstrate that ARABIDILLO-1 and -2 promote lateral root development. arabidillo-1/-2 mutants form fewer lateral roots, and ARABIDILLO-1-overexpressing lines produce more lateral roots than wild-type seedlings. ARABIDILLO-yellow fluorescent protein fusions are nuclear. ARABIDILLO proteins contain an F-box motif, and thus may target other proteins for proteasomal degradation. Overexpression of ARABIDILLO-1 protein fragments, including F-box fragments, in wild-type seedlings reduces lateral root formation to the level of the arabidillo-1/-2 mutant. We have shown that plant beta-catenin-related proteins regulate root development. We suggest that ARABIDILLO proteins may target an inhibitor of lateral root development for degradation and propose that Arabidopsis 13-catenin-related proteins define a previously uncharacterized pathway that promotes root branching. specialized plant beta catenin arabidillo 103 5 1621-1626 2006 https://www.documentation.ird.fr/hor/fdi:010052290 10.1073/pnas.0507575103 [F B010052290] https://www.documentation.ird.fr/hor/fdi:010052290 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2025-01/010052290.pdf IRD - Base Horizon / Pleins textes 2006-03-30 2025-01-03 fdi:010052290 fre