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Identification of the Genes Involved in Stomatal Development via Epidermal Phenotype Scoring
Published on: January 20, 2023
Plant twitter: ligands under 140 amino acids enforcing stomatal patterning
Amanda L Rychel1, Kylee M Peterson, Keiko U Torii
1Department of Biology, University of Washington, Seattle, WA 98195, USA.
Journal of Plant Research
|March 26, 2010
Summary
Plant stomatal density is regulated by secreted peptides called EPFLs. These peptides, like EPF1 and EPFL9, compete for receptors, influencing plant development and evolution.
Area of Science:
- Plant Biology
- Developmental Biology
- Genetics
Background:
- Stomata are crucial for land plant survival, regulating gas exchange.
- Stomatal density and patterning are controlled by genetic and environmental factors.
- The Epidermal Patterning Factor-Like (EPFL) peptide family regulates stomatal development.
Purpose of the Study:
- To investigate the roles of EPFL ligands in stomatal patterning.
- To explore the potential for ligand competition in stomatal development.
- To examine the evolutionary origins of EPFL genes in land plants.
Main Methods:
- Analysis of EPFL gene expression patterns in different plant tissues.
- Genetic studies to determine the function of EPFL ligands.
- Comparative sequence analysis of EPFL genes across plant species.
Main Results:
- EPF1 and EPFL2 negatively regulate stomatal density when expressed in stomatal lineage cells.
- EPFL6 (CHALLAH) negatively regulates density from subepidermal tissues, while EPFL9 (STOMAGEN) positively regulates density from mesophyll.
- Evidence suggests EPFL ligands compete for a common receptor complex.
- EPFL-family genes are conserved in basal land plants like mosses and lycophytes.
Conclusions:
- Stomatal patterning involves complex interactions including ligand competition and inter-tissue communication.
- The genetic machinery for stomatal patterning likely evolved early in land plant history.
- EPFLs represent a conserved signaling system regulating a fundamental plant innovation.
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