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A Mechanistic Link between STM and CUC1 during Arabidopsis Development
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A Mechanistic Link between STM and CUC1 during Arabidopsis Development
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Journal Article
A Mechanistic Link between STM and CUC1 during Arabidopsis Development
2011
Overview
The KNOXI transcription factor SHOOT MERISTEMLESS (STM) is required to establish and maintain the Arabidopsis (Arabidopsis thaliana) apical meristem, yet little is known about its direct targets. Using different approaches we demonstrate that the induction of STM causes a significant up-regulation of the organ boundary gene CUP SHAPED COTYLEDON1 (CUC1), which is specific and independent of other meristem regulators. We further show that the regulation of CUC1 by STM is direct and identify putative binding sites in its promoter. Continuous expression of STM in Arabidopsis leaf primordia also causes the activation of CUC2-3, as well as microRNA MIR164a, which provides a negative feedback loop by posttranscriptionally regulating CUC1 and CUC2. The results bring new insights into the mechanistic links between KNOXI and CUC transcription factors and contribute to the understanding of the regulatory network controlled by STM.
Publisher
American Society of Plant Biologists
Subject
/ Arabidopsis - growth & development
/ Arabidopsis Proteins - genetics
/ Arabidopsis Proteins - metabolism
/ Biological and medical sciences
/ DEVELOPMENT AND HORMONE ACTION
/ Fundamental and applied biological sciences. Psychology
/ Gene Expression Regulation, Plant
/ Genes
/ genetics
/ Homeodomain Proteins - metabolism
/ Leaves
/ MicroRNA
/ Plant physiology and development
/ Plants
/ Promoter Regions, Genetic - genetics
/ shoots
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