GL3 Encodes a bHLH Protein That Regulates Trichome Development in Arabidopsis Through Interaction With GL1 and TTG1

GL3 Encodes a bHLH Protein That Regulates Trichome Development in Arabidopsis Through Interaction... C. Thomas Payne a , Fan Zhang a , and Alan M. Lloyd a a Molecular Cell and Developmental Biology and the Institute for Cellular and Molecular Biology, University of Texas, Austin, Texas 78712-1095 Corresponding author: Alan M. Lloyd, MCDB and ICMB, 2500 Speedway, University of Texas, Austin, TX 78712-1095., lloyd@uts.cc.utexas.edu (E-mail) Communicating editor: C. S. G ASSER Arabidopsis trichome development and differentiation is a well-studied model for plant cell-fate determination and morphogenesis. Mutations in TRANSPARENT TESTA GLABRA1 ( TTG1 ) result in several pleiotropic defects including an almost complete lack of trichomes. The complex phenotype caused by ttg1 mutations is suppressed by ectopic expression of the maize anthocyanin regulator R. Here it is demonstrated that the Arabidopsis trichome development locus GLABRA3 ( GL3 ) encodes an R homolog. GL3 and GLABRA1 (GL1) interact when overexpressed together in plants. Yeast two-hybrid assays indicate that GL3 participates in physical interactions with GL1, TTG1, and itself, but that GL1 and TTG1 do not interact. These data suggest a reiterated combinatorial model for the differential regulation of such diverse developmental pathways as trichome cell-fate determination, root hair spacing, and anthocyanin secondary metabolism. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Genetics Genetics Society of America

GL3 Encodes a bHLH Protein That Regulates Trichome Development in Arabidopsis Through Interaction With GL1 and TTG1

Genetics, Volume 156 (3): 1349 – Nov 1, 2000

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Publisher
Genetics Society of America
Copyright
Copyright © 2000 by the Genetics Society of America
ISSN
0016-6731
eISSN
1943-2631
Publisher site
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Abstract

C. Thomas Payne a , Fan Zhang a , and Alan M. Lloyd a a Molecular Cell and Developmental Biology and the Institute for Cellular and Molecular Biology, University of Texas, Austin, Texas 78712-1095 Corresponding author: Alan M. Lloyd, MCDB and ICMB, 2500 Speedway, University of Texas, Austin, TX 78712-1095., lloyd@uts.cc.utexas.edu (E-mail) Communicating editor: C. S. G ASSER Arabidopsis trichome development and differentiation is a well-studied model for plant cell-fate determination and morphogenesis. Mutations in TRANSPARENT TESTA GLABRA1 ( TTG1 ) result in several pleiotropic defects including an almost complete lack of trichomes. The complex phenotype caused by ttg1 mutations is suppressed by ectopic expression of the maize anthocyanin regulator R. Here it is demonstrated that the Arabidopsis trichome development locus GLABRA3 ( GL3 ) encodes an R homolog. GL3 and GLABRA1 (GL1) interact when overexpressed together in plants. Yeast two-hybrid assays indicate that GL3 participates in physical interactions with GL1, TTG1, and itself, but that GL1 and TTG1 do not interact. These data suggest a reiterated combinatorial model for the differential regulation of such diverse developmental pathways as trichome cell-fate determination, root hair spacing, and anthocyanin secondary metabolism.

Journal

GeneticsGenetics Society of America

Published: Nov 1, 2000

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