Open Access Highly Accessed Research article

ANGUSTIFOLIA is a central component of tissue morphogenesis mediated by the atypical receptor-like kinase STRUBBELIG

Yang Bai13, Prasad Vaddepalli2, Lynette Fulton24, Hemal Bhasin1, Martin Hülskamp1 and Kay Schneitz2*

Author Affiliations

1 Botanisches Institut III, Universität Köln, Zülpicher Straße 47b, 50674, Köln, Germany

2 Entwicklungsbiologie der Pflanzen, Wissenschaftszentrum Weihenstephan, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany

3 Present address: Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Köln, Germany

4 Present address: School of Biological Sciences, Monash University, 3800, Melbourne, VIC, Australia

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BMC Plant Biology 2013, 13:16  doi:10.1186/1471-2229-13-16

Published: 31 January 2013



During plant tissue morphogenesis cells have to coordinate their behavior to allow the generation of the size, shape and cellular patterns that distinguish an organ. Despite impressive progress the underlying signaling pathways remain largely unexplored. In Arabidopsis thaliana, the atypical leucine-rich repeat receptor-like kinase STRUBBELIG (SUB) is involved in signal transduction in several developmental processes including the formation of carpels, petals, ovules and root hair patterning. The three STRUBBELIG-LIKE MUTANT (SLM) genes DETORQUEO (DOQ), QUIRKY (QKY) and ZERZAUST (ZET) are considered central elements of SUB-mediated signal transduction pathways as corresponding mutants share most phenotypic aspects with sub mutants.


Here we show that DOQ corresponds to the previously identified ANGUSTIFOLIA gene. The genetic analysis revealed that the doq-1 mutant exhibits all additional mutant phenotypes and conversely that other an alleles show the slm phenotypes. We further provide evidence that SUB and AN physically interact and that AN is not required for subcellular localization of SUB.


Our data suggest that AN is involved in SUB signal transduction pathways. In addition, they reveal previously unreported functions of AN in several biological processes, such as ovule development, cell morphogenesis in floral meristems, and root hair patterning. Finally, SUB and AN may directly interact at the plasma membrane to mediate SUB-dependent signaling.

ANGUSTIFOLIA; Flower; Ovule; Receptor-like kinase; Root hair patterning; Signal transduction; Tissue morphogenesis; STRUBBELIG