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Complex peptide hormone signaling in plant stem cells
1Department of Biological Sciences, Auburn University, 36849, Auburn, AL, USA.
Current Opinion in Plant Biology
|September 6, 2023
Summary
Plant peptide hormones, CLAVATA3/EMBRYO-SURROUNDING REGION (CLEs) and ROOT MERISTEM GROWTH FACTOR (RGFs), are crucial for stem cell maintenance. Their evolution and genetic compensation mechanisms in angiosperms drive plant development and diversity.
Area of Science:
- Plant Biology
- Developmental Biology
- Genetics
Background:
- Peptide hormones regulate plant development via cell-cell signaling.
- Stem cell maintenance in land plants relies on conserved peptide hormone families.
- CLAVATA3/EMBRYO-SURROUNDING REGION (CLEs) and ROOT MERISTEM GROWTH FACTOR (RGFs) are key peptide hormone families involved in meristem regulation.
Purpose of the Study:
- To review recent advances in understanding CLE and RGF peptide hormone functions in plant stem cell regulation.
- To explore the evolutionary context of CLE/RGF gene families across plant lineages.
- To highlight downstream signaling crosstalk and genetic compensation mechanisms.
Main Methods:
- Literature review of recent research on CLE and RGF peptide hormones.
- Analysis of gene identification and evolutionary patterns of CLE/RGF families.
- Discussion of signaling pathways and genetic compensation in meristem maintenance.
Main Results:
- CLE and RGF gene families have significantly expanded in angiosperms.
- Genetic compensation mechanisms involving paralogous genes ensure robust stem cell homeostasis.
- Downstream crosstalk between peptide hormones and other signaling pathways is established.
Conclusions:
- CLE/RGF peptide hormones play vital roles in stem cell maintenance and plant development.
- Gene duplication and compensation are critical for robust developmental signaling in angiosperms.
- Understanding these mechanisms can illuminate plant morphological diversity and evolutionary innovation.
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