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PMID: 12244266 Published · ppublish English Journal Article

Roles of the GLABROUS1 and TRANSPARENT TESTA GLABRA Genes in Arabidopsis Trichome Development.

The Plant cell ·Vol. 6 ·No. 8 ·1994-08-00 ·Pages 1065-1076

Larkin JC, Oppenheimer DG, Lloyd AM, Paparozzi ET, Marks MD

Abstract

Arabidopsis trichomes are branched, single-celled epidermal hairs. These specialized cells provide a convenient model for investigating the specification of cell fate in plants. Two key genes regulating the initiation of trichome development are GLABROUS1 (GL1) and TRANSPARENT TESTA GLABRA (TTG). GL1 is a member of the myb gene family. The maize R gene, which can functionally complement the Arabidopsis ttg mutation, encodes a basic helix-loop-helix protein. We used constitutively expressed copies of the GL1 and R genes to test hypotheses about the roles of GL1 and TTG in trichome development. The results support the hypothesis that TTG and GL1 cooperate at the same point in the trichome developmental pathway. Furthermore, the constitutive expression of both GL1 and R in the same plant caused trichomes to develop on all shoot epidermal surfaces. Results were also obtained indicating that TTG plays an additional role in inhibiting neighboring cells from becoming trichomes.

Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Larkin J. C.
Department of Genetics and Cell Biology, University of Minnesota, 1445 Gortner Avenue, St. Paul, Minnesota 55108-1095.
Oppenheimer D. G.
Lloyd A. M.
Paparozzi E. T.
Marks M. D.
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Article Info
Journal
The Plant cell
Abbr.
Plant Cell
ISSN
1532-298X
DOI
10.1105/tpc.6.8.1065
Published
1994-08-00
Pages
1065-1076
Language
English
Region
England
NLM ID
9208688
PMCID
PMC160501
External Links
PubMed source DOI: 10.1105/tpc.6.8.1065 PMC Full Text View journal details
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