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

D. Welch, H. Hassan, I. Blilou, G.H. Immink, R. Heidstra

    Research output: Contribution to journalArticleAcademicpeer-review

    177 Citations (Scopus)

    Abstract

    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.
    Original languageEnglish
    Pages (from-to)2196-2204
    JournalGenes and Development
    Volume21
    DOIs
    Publication statusPublished - 2007

    Keywords

    • radial organization
    • gene
    • scarecrow
    • thaliana
    • movement
    • meristem
    • plants
    • expression
    • endodermis
    • efficient

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