Two WD-repeat genes from cotton are functional homologues of the Arabidopsis thaliana TRANSPARENT TESTA GLABRA1 (TTG1) gene

Two WD-repeat genes from cotton are functional homologues of the Arabidopsis thaliana TRANSPARENT... Cotton fibres are single, highly elongated cells derived from the outer epidermis of ovules, and are developmentally similar to the trichomes of Arabidopsis thaliana. To identify genes involved in the molecular control of cotton fibre initiation, we isolated four putative homologues of the Arabidopsis trichome-associated gene TRANSPARENT TESTA GLABRA1 (TTG1). All four WD-repeat genes are derived from the ancestral D diploid genome of tetraploid cotton and are expressed in many tissues throughout the plant, including ovules and growing fibres. Two of the cotton genes were able to restore trichome formation in ttg1 mutant Arabidopsis plants. Both these genes also complemented the anthocyanin defect in a white-flowered Matthiola incana ttg1 mutant. These results demonstrate parallels in differentiation between trichomes in cotton and Arabidopsis, and indicate that these cotton genes may be functional homologues of AtTTG1. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

Two WD-repeat genes from cotton are functional homologues of the Arabidopsis thaliana TRANSPARENT TESTA GLABRA1 (TTG1) gene

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Publisher
Kluwer Academic Publishers
Copyright
Copyright © 2005 by Springer
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1007/s11103-004-6768-1
Publisher site
See Article on Publisher Site

Abstract

Cotton fibres are single, highly elongated cells derived from the outer epidermis of ovules, and are developmentally similar to the trichomes of Arabidopsis thaliana. To identify genes involved in the molecular control of cotton fibre initiation, we isolated four putative homologues of the Arabidopsis trichome-associated gene TRANSPARENT TESTA GLABRA1 (TTG1). All four WD-repeat genes are derived from the ancestral D diploid genome of tetraploid cotton and are expressed in many tissues throughout the plant, including ovules and growing fibres. Two of the cotton genes were able to restore trichome formation in ttg1 mutant Arabidopsis plants. Both these genes also complemented the anthocyanin defect in a white-flowered Matthiola incana ttg1 mutant. These results demonstrate parallels in differentiation between trichomes in cotton and Arabidopsis, and indicate that these cotton genes may be functional homologues of AtTTG1.

Journal

Plant Molecular BiologySpringer Journals

Published: Nov 25, 2004

References

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