SABRE is required for stabilization of root hair patterning in Arabidopsis thaliana

Stefano Pietra; Patricia Lang; Markus Grebe

doi:10.1111/ppl.12257

journal article Open Access Sep 18, 2014

SABRE is required for stabilization of root hair patterning in Arabidopsis thaliana

Stefano Pietra Patricia Lang

Markus Grebe

Physiologia Plantarum Vol. 153 No. 3 pp. 440-453 · Wiley

View at Publisher Save 10.1111/ppl.12257

Abstract

Patterned differentiation of distinct cell types is essential for the development of multicellular organisms. The root epidermis of Arabidopsis thaliana is composed of alternating files of root hair and non‐hair cells and represents a model system for studying the control of cell‐fate acquisition. Epidermal cell fate is regulated by a network of genes that translate positional information from the underlying cortical cell layer into a specific pattern of differentiated cells. While much is known about the genes of this network, new players continue to be discovered. Here we show that the SABRE (SAB) gene, known to mediate microtubule organization, anisotropic cell growth and planar polarity, has an effect on root epidermal hair cell patterning. Loss of SAB function results in ectopic root hair formation and destabilizes the expression of cell fate and differentiation markers in the root epidermis, including expression of the WEREWOLF (WER) and GLABRA2 (GL2) genes. Double mutant analysis reveal that wer and caprice (cpc) mutants, defective in core components of the epidermal patterning pathway, genetically interact with sab. This suggests that SAB may act on epidermal patterning upstream of WER and CPC. Hence, we provide evidence for a role of SAB in root epidermal patterning by affecting cell‐fate stabilization. Our work opens the door for future studies addressing SAB‐dependent functions of the cytoskeleton during root epidermal patterning.

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Details

Published: Sep 18, 2014
Vol/Issue: 153(3)
Pages: 440-453
License: View

Authors

S

Stefano Pietra

Umeå Plant Science Centre, Department of Plant Physiology Umeå University Umeå SE‐90187 Sweden

P

Patricia Lang

Umeå Plant Science Centre, Department of Plant Physiology Umeå University Umeå SE‐90187 Sweden

M

Markus Grebe

Umeå Plant Science Centre, Department of Plant Physiology Umeå University Umeå SE‐90187 Sweden; Institute of Biochemistry and Biology, Plant Physiology University of Potsdam Potsdam‐Golm DE‐14476 Germany

Funding

Swedish Research Council VetenskapsrÃ¥det Award: 2009-4846

Cite This Article

Stefano Pietra, Patricia Lang, Markus Grebe (2014). SABRE is required for stabilization of root hair patterning in Arabidopsis thaliana. Physiologia Plantarum, 153(3), 440-453. https://doi.org/10.1111/ppl.12257

SABRE is required for stabilization of root hair patterning in Arabidopsis thaliana

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