AtMYB93 is a novel negative regulator of lateral root development in Arabidopsis

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 203(2014), 4 vom: 01. Sept., Seite 1194-1207
1. Verfasser:	Gibbs, Daniel J (VerfasserIn)
Weitere Verfasser:	Voß, Ute, Harding, Susan A, Fannon, Jessica, Moody, Laura A, Yamada, Erika, Swarup, Kamal, Nibau, Candida, Bassel, George W, Choudhary, Anushree, Lavenus, Julien, Bradshaw, Susan J, Stekel, Dov J, Bennett, Malcolm J, Coates, Juliet C
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2014
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't ARABIDILLO MYB abscisic acid auxin endodermis lateral roots negative regulation Arabidopsis Proteins mehr... Indoleacetic Acids MYB93 protein, Arabidopsis Transcription Factors

Beschreibung
Zusammenfassung:	© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust. Plant root system plasticity is critical for survival in changing environmental conditions. One important aspect of root architecture is lateral root development, a complex process regulated by hormone, environmental and protein signalling pathways. Here we show, using molecular genetic approaches, that the MYB transcription factor AtMYB93 is a novel negative regulator of lateral root development in Arabidopsis. We identify AtMYB93 as an interaction partner of the lateral-root-promoting ARABIDILLO proteins. Atmyb93 mutants have faster lateral root developmental progression and enhanced lateral root densities, while AtMYB93-overexpressing lines display the opposite phenotype. AtMYB93 is expressed strongly, specifically and transiently in the endodermal cells overlying early lateral root primordia and is additionally induced by auxin in the basal meristem of the primary root. Furthermore, Atmyb93 mutant lateral root development is insensitive to auxin, indicating that AtMYB93 is required for normal auxin responses during lateral root development. We propose that AtMYB93 is part of a novel auxin-induced negative feedback loop stimulated in a select few endodermal cells early during lateral root development, ensuring that lateral roots only develop when absolutely required. Putative AtMYB93 homologues are detected throughout flowering plants and represent promising targets for manipulating root systems in diverse crop species
Beschreibung:	Date Completed 03.04.2015 Date Revised 22.03.2024 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.12879