Arabidopsis JACKDAW and MAGPIE zinc finger proteins delimit asymmetric cell division and stabilize tissue boundaries by restricting SHORT-ROOT action

In the Arabidopsis root, the SHORT-ROOT transcription factor moves outward to the ground tissue from its site of transcription in the stele and is required for the specification of the endodermis and the stem cell organizing quiescent center cells. In addition, SHORT-ROOT and the downstream transcri...

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Bibliographic Details
Published in:Genes & development 2007-09, Vol.21 (17), p.2196-2204
Main Authors: Welch, David, Hassan, Hala, Blilou, Ikram, Immink, Richard, Heidstra, Renze, Scheres, Ben
Format: Article
Language:English
Subjects:
Arabidopsis
Arabidopsis - genetics
Arabidopsis - growth & development
Arabidopsis Proteins - physiology
Carrier Proteins - physiology
Cell Division
efficient
endodermis
expression
gene
Gene Expression Regulation, Plant
Genes, Plant
meristem
movement
Plant Proteins - metabolism
Plant Roots - metabolism
plants
radial organization
Research Paper
scarecrow
thaliana
Transcription Factors - physiology
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Summary:In the Arabidopsis root, the SHORT-ROOT transcription factor moves outward to the ground tissue from its site of transcription in the stele and is required for the specification of the endodermis and the stem cell organizing quiescent center cells. In addition, SHORT-ROOT and the downstream transcription factor SCARECROW control an oriented cell division in ground tissue stem cell daughters. Here, we show that the JACKDAW and MAGPIE genes, which encode members of a plant-specific family of zinc finger proteins, act in a SHR-dependent feed-forward loop to regulate the range of action of SHORT-ROOT and SCARECROW. JACKDAW expression is initiated independent of SHORT-ROOT and regulates the SCARECROW expression domain outside the stele, while MAGPIE expression depends on SHORT-ROOT and SCARECROW. We provide evidence that JACKDAW and MAGPIE regulate tissue boundaries and asymmetric cell division and can control SHORT-ROOT and SCARECROW activity in a transcriptional and protein interaction network.
ISSN:0890-9369
1549-5477
DOI:10.1101/gad.440307