cot1: A Regulator of Arabidopsis Trichome Initiation

cot1: A Regulator of Arabidopsis Trichome Initiation Daniel B. Szymanski a , Daniel A. Klis a , John C. Larkin a , and M. David Marks a a Department of Genetics and Cell Biology, and Plant Molecular and Genetics Institute, University of Minnesota, St. Paul, Minnesota 55108 Corresponding author: M. David Marks, University of Minnesota, Department of Genetics and Cell Biology, 250 Biological Sciences Center, 1445 Gortner Ave., St. Paul, MN 55108-1068, dmarks@biosci.cbs.umn.edu (E-mail). Communicating editor: E. M EYEROWITZ In Arabidopsis, the timing and spatial arrangement of trichome initiation is tightly regulated and requires the activity of the GLABROUS1 ( GL1 ) gene. The CO TYLEDON T RICHOME 1 ( COT1 ) gene affects trichome initiation during late stages of leaf development and is described in this article. In the wild-type background, cot1 has no observable effect on trichome initiation. GL1 overexpression in wild-type plants leads to a modest number of ectopic trichomes and to a decrease in trichome number on the adaxial leaf surface. The cot1 mutation enhances GL1 -overexpression-dependent ectopic trichome formation and also induces increased leaf trichome initiation. The expressivity of the cot1 phenotype is sensitive to cot1 and 35S:: GL1 gene dosage, and the most severe phenotypes are observed when cot1 and 35S:: GL1 are homozygous. The COT1 locus is located on chromosome 2 15.3 cM north of er. Analysis of the interaction between cot1 , try , and 35S:: GL1 suggests that COT1 is part of a complex signal transduction pathway that regulates GL1 -dependent adoption of the trichome cell fate. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Genetics Genetics Society of America

cot1: A Regulator of Arabidopsis Trichome Initiation

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Publisher
Genetics Society of America
Copyright
Copyright © 1998 by the Genetics Society of America
ISSN
0016-6731
eISSN
1943-2631
Publisher site
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Abstract

Daniel B. Szymanski a , Daniel A. Klis a , John C. Larkin a , and M. David Marks a a Department of Genetics and Cell Biology, and Plant Molecular and Genetics Institute, University of Minnesota, St. Paul, Minnesota 55108 Corresponding author: M. David Marks, University of Minnesota, Department of Genetics and Cell Biology, 250 Biological Sciences Center, 1445 Gortner Ave., St. Paul, MN 55108-1068, dmarks@biosci.cbs.umn.edu (E-mail). Communicating editor: E. M EYEROWITZ In Arabidopsis, the timing and spatial arrangement of trichome initiation is tightly regulated and requires the activity of the GLABROUS1 ( GL1 ) gene. The CO TYLEDON T RICHOME 1 ( COT1 ) gene affects trichome initiation during late stages of leaf development and is described in this article. In the wild-type background, cot1 has no observable effect on trichome initiation. GL1 overexpression in wild-type plants leads to a modest number of ectopic trichomes and to a decrease in trichome number on the adaxial leaf surface. The cot1 mutation enhances GL1 -overexpression-dependent ectopic trichome formation and also induces increased leaf trichome initiation. The expressivity of the cot1 phenotype is sensitive to cot1 and 35S:: GL1 gene dosage, and the most severe phenotypes are observed when cot1 and 35S:: GL1 are homozygous. The COT1 locus is located on chromosome 2 15.3 cM north of er. Analysis of the interaction between cot1 , try , and 35S:: GL1 suggests that COT1 is part of a complex signal transduction pathway that regulates GL1 -dependent adoption of the trichome cell fate.

Journal

GeneticsGenetics Society of America

Published: Jun 1, 1998

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