Regulation of inflorescence architecture by intertissue layer ligand–receptor communication between endodermis and phloem
Open Access
- 2 April 2012
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 109 (16), 6337-6342
- https://doi.org/10.1073/pnas.1117537109
Abstract
Multicellular organisms achieve final body shape and size by coordinating cell proliferation, expansion, and differentiation. Loss of function in the Arabidopsis ERECTA (ER) receptor-kinase gene confers characteristic compact inflorescence architecture, but its underlying signaling pathways remain unknown. Here we report that the expression of ER in the phloem is sufficient to rescue compact er inflorescences. We further identified two EPIDERMAL PATTERNING FACTOR-LIKE (EPFL) secreted peptide genes, EPFL4 and EPFL6/CHALLAH (CHAL), as redundant, upstream components of ER-mediated inflorescence growth. The expression of EPFL4 or EPFL6 in the endodermis, a layer adjacent to phloem, is sufficient to rescue the er-like inflorescence of epfl4 epfl6 plants. EPFL4 and EPFL6 physically associate with ER in planta. Finally, transcriptome analysis of er and epfl4 epfl6 revealed a potential downstream component as well as a role for plant hormones in EPFL4/6- and ER-mediated inflorescence growth. Our results suggest that intercell layer communication between the endodermis and phloem mediated by peptide ligands and a receptor kinase coordinates proper inflorescence architecture in Arabidopsis.Keywords
This publication has 42 references indexed in Scilit:
- Direct interaction of ligand–receptor pairs specifying stomatal patterningGenes & Development, 2012
- Molecular Profiling of Stomatal Meristemoids Reveals New Component of Asymmetric Cell Division and Commonalities among Stem Cell Populations inArabidopsisPlant Cell, 2011
- The presence of multiple introns is essential for ERECTA expression in ArabidopsisRNA, 2011
- Generation of Signaling Specificity in Arabidopsis by Spatially Restricted Buffering of Ligand–Receptor InteractionsPlant Cell, 2011
- Regulatory Network Identification by Genetical Genomics: Signaling Downstream of the Arabidopsis Receptor-Like Kinase ERECTAPlant Physiology, 2010
- Complex signals for simple cells: the expanding ranks of signals and receptors guiding stomatal developmentCurrent Opinion in Plant Biology, 2010
- Out of the Mouths of Plants: The Molecular Basis of the Evolution and Diversity of Stomatal DevelopmentPlant Cell, 2010
- Non-cell-autonomous control of vascular stem cell fate by a CLE peptide/receptor systemProceedings of the National Academy of Sciences, 2008
- Growth coordination and the shoot epidermisCurrent Opinion in Plant Biology, 2008
- The secretory peptide gene EPF1 enforces the stomatal one-cell-spacing ruleGenes & Development, 2007