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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 6 - Molecular Biology (D. Weigel)     Display Documents

ID: 561623.0, MPI für Entwicklungsbiologie / Abteilung 6 - Molecular Biology (D. Weigel)
Control of lateral organ development and flowering time by the Arabidopsis thaliana MADS-box Gene AGAMOUS-LIKE6
Authors:Koo, S. C.; Bracko, O.; Park, M. S.; Schwab, R.; Chun, H. J.; Park, K. M.; Seo, J. S.; Grbic, V.; Balasubramanian, S.; Schmid, M.; Godard, F.; Yun, D. J.; Lee, S. Y.; Cho, M. J.; Weigel, D.; Kim, M. C.
Date of Publication (YYYY-MM-DD):2010-06
Title of Journal:Plant Journal
Issue / Number:5
Start Page:807
End Page:816
Review Status:not specified
Audience:Not Specified
Abstract / Description:MADS-domain transcription factors play pivotal roles in various developmental processes. The lack of simple loss-of-function phenotypes provides impediments to understand the biological function of some of the MADS-box transcription factors. Here we have characterized the potential role of the Arabidopsis thaliana AGAMOUS-LIKE6 (AGL6) gene by fusing full-length coding sequence with transcriptional activator and repressor domains and suggest a role for AGL6 in lateral organ development and flowering. Upon photoperiodic induction of flowering, AGL6 becomes expressed in abaxial and proximal regions of cauline leaf primordia, as well as the cryptic bracts subtending flowers. In developing flowers, AGL6 is detected in the proximal regions of all floral organs and in developing ovules. Converting AGL6 into a strong activator through fusion to the VP16 domain triggers bract outgrowth, implicating AGL6 in the development of bractless flowers in Arabidopsis. In addition, ectopic reproductive structures form on both bracts and flowers in gAGL6::VP16 transgenic plants, which is dependent on B and C class homeotic genes, but independent of LEAFY. Overexpression of both AGL6 and its transcriptional repressor form, AGL6:: EAR, causes precocious flowering and terminal flower formation, suggesting that AGL6 suppresses the function of a floral repressor.
Free Keywords:arabidopsis; mads-box gene; agl6; bract; flower development; flowering; floral meristem identity; transcription factors; ectopic expression; repression domain; ovule development; homeotic genes; evolution; protein; activation; family
External Publication Status:published
Document Type:Article
Affiliations:MPI für Entwicklungsbiologie/Abteilung 6 - Molekulare Biologie (Detlef Weigel)
External Affiliations:Max Planck Inst Dev Biol, Dept Mol Biol, D-72076 Tubingen, Germany Max Planck Inst Dev Biol, Dept Mol Biol, D-72076 Tubingen, Germany Max Planck Inst Dev Biol, Dept Mol Biol, D-72076 Tubingen, Germany Gyeongsang Natl Univ, Div Appl Life Sci, Program BK21, Plant Mol Biol & Biotechnol Res Ctr, Jinju 660701, South Korea Gyeongsang Natl Univ, Environm Biotechnol Natl Core Res Ctr, Jinju 660701, South Korea Salk Inst Biol Studies, Plant Biol Lab, La Jolla, CA 92037 USA %G English
Identifiers:ISSN:0960-7412 %R DOI 10.1111/j.1365-313X.2010.04192.x [ID No:1]
ISI:000278080300007 [ID No:2]
ISI:000278080300007 [ID No:3]
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