A network of CLAVATA receptors buffers auxin-dependent meristem maintenance
Preprint
Abstract
Plant body plans are elaborated in response to both environmental and endogenous cues. How these inputs intersect to promote growth and development remains poorly understood. During reproductive development, central zone stem cell proliferation in inflorescence meristems is negatively regulated by the CLAVATA3 (CLV3) peptide signaling pathway. In contrast, floral primordia formation on meristem flanks requires the hormone auxin. Here we show that CLV3 signaling is also necessary for auxin-dependent floral primordia generation and that this function is partially masked by both inflorescence fasciation and heat-induced auxin biosynthesis. Stem cell regulation by CLAVATA signaling is separable from primordia formation but is also sensitized to temperature and auxin levels. Additionally, we uncover a novel role for the CLV3 receptor CLAVATA1 in auxin- dependent meristem maintenance in cooler environments. As such, CLV3 signaling buffers multiple auxin-dependent shoot processes across divergent thermal environments with opposing effects on cell proliferation in different meristem regions.Keywords
All Related Versions
- Published version: Nature Plants, 9 (8), 1306.
This publication has 74 references indexed in Scilit:
- The Subread aligner: fast, accurate and scalable read mapping by seed-and-voteNucleic Acids Research, 2013
- GC-Content Normalization for RNA-Seq DataBMC Bioinformatics, 2011
- Natural Variation in Arabidopsis: From Molecular Genetics to Ecological GenomicsPlant Physiology, 2011
- An Evolutionarily Conserved Pseudokinase Mediates Stem Cell Production in PlantsThe Plant Cell, 2011
- Plant Stem Cell Signaling Involves Ligand-Dependent Trafficking of the CLAVATA1 Receptor KinaseCurrent Biology, 2011
- Stem Cell Signaling in Arabidopsis Requires CRN to Localize CLV2 to the Plasma MembranePlant Physiology, 2009
- edgeR: a Bioconductor package for differential expression analysis of digital gene expression dataBioinformatics, 2009
- The Receptor Kinase CORYNE ofArabidopsisTransmits the Stem Cell–Limiting Signal CLAVATA3 Independently of CLAVATA1The Plant Cell, 2008
- Auxin biosynthesis by the YUCCA flavin monooxygenases controls the formation of floral organs and vascular tissues in ArabidopsisGenes & Development, 2006
- The BAM1/BAM2 Receptor-Like Kinases Are Important Regulators ofArabidopsisEarly Anther DevelopmentThe Plant Cell, 2006