Abstract
The frequency and orientation of cell division are regulated by intercellular signalling molecules; however, tissue-specific regulatory systems for cell divisions are only partially understood. Here, we report that the peptide hormone CLAVATA3/ESR-RELATED 9/10 (CLE9/10) regulates two different developmental processes, stomatal lineage development and xylem development, through two distinct receptor systems in Arabidopsis thaliana. We show that the receptor kinase HAESA-LIKE 1 (HSL1) is a CLE9/10 receptor that regulates stomatal lineage cell division, and BARELY NO MERISTEM (BAM) class receptor kinases are CLE9/10 receptors that regulate periclinal cell division of xylem precursor cells. Both HSL1 and BAM1 bind to CLE9/10, but only HSL1 recruits SOMATIC EMBRYOGENESIS RECEPTOR KINASES as co-receptors in the presence of CLE9/10, suggesting different signalling modes for these receptor systems.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Arabidopsis / genetics*
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Arabidopsis / growth & development
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Arabidopsis / metabolism
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Arabidopsis Proteins / genetics
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Arabidopsis Proteins / metabolism*
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Genes, Reporter
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Intercellular Signaling Peptides and Proteins / genetics
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Intercellular Signaling Peptides and Proteins / metabolism*
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Meristem / genetics
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Meristem / growth & development
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Meristem / metabolism
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Plant Stomata / genetics
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Plant Stomata / growth & development
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Plant Stomata / metabolism
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Plant Vascular Bundle / genetics
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Plant Vascular Bundle / growth & development
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Plant Vascular Bundle / metabolism
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Promoter Regions, Genetic / genetics
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Protein Serine-Threonine Kinases / genetics
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Protein Serine-Threonine Kinases / metabolism
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Recombinant Fusion Proteins
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Repressor Proteins / genetics
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Repressor Proteins / metabolism
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Signal Transduction*
Substances
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AT1G26600 protein, Arabidopsis
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AT1G69320 protein, Arabidopsis
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Arabidopsis Proteins
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HSL1 protein, Arabidopsis
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Intercellular Signaling Peptides and Proteins
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Recombinant Fusion Proteins
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Repressor Proteins
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BAM1 protein, Arabidopsis
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Protein Serine-Threonine Kinases