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CLE-CLAVATA1 Signaling Pathway Modulates Lateral Root Development under Sulfur Deficiency
Wei Dong1, Yinghua Wang2, Hideki Takahashi3
1Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA. wdong@msu.edu.
Plants (Basel, Switzerland)
|April 21, 2019
Summary
Plant root development is regulated by sulfur availability. The CLAVATA1 (CLV1) receptor kinase and CLAVATA3 (CLV3)/EMBRYO SURROUNDING REGION (CLE) peptides control lateral root growth in response to sulfur levels.
Area of Science:
- Plant Biology
- Molecular Signaling
- Developmental Biology
Background:
- Plant root architecture is crucial for nutrient acquisition and is highly responsive to soil nutrient availability.
- Sulfur (S) is an essential macronutrient, yet the molecular mechanisms governing root development under varying S conditions are not fully understood.
- Root system architecture, particularly lateral root (LR) development, plays a vital role in plant growth and reproduction.
Purpose of the Study:
- To elucidate the molecular mechanisms controlling lateral root development in response to sulfur availability in *Arabidopsis thaliana*.
- To investigate the role of the CLAVATA3 (CLV3)/EMBRYO SURROUNDING REGION (CLE) peptide and CLAVATA1 (CLV1) receptor kinase signaling module in mediating root responses to sulfur.
- To understand how changes in sulfur levels modulate LR density and the underlying signaling pathways.
Main Methods:
- Phenotypic analysis of wild-type and *clv1* mutant *Arabidopsis thaliana* seedlings under varying sulfur (sulfate) availability.
- Quantification of lateral root (LR) density and daily increase rates.
- Analysis of *CLE2* and *CLE3* transcript levels under different sulfur conditions.
Main Results:
- Wild-type seedlings exhibited reduced LR density under prolonged sulfur deficiency, which was restored upon sulfate supply.
- The *clv1* mutant displayed an increased LR density under sulfur deficiency compared to wild-type, indicating CLV1's inhibitory role in LR development under these conditions.
- Transcript levels of *CLE2* and *CLE3* decreased under sulfur deficiency, suggesting regulation of CLE peptide signals via CLV1-mediated feedback.
Conclusions:
- The CLE-CLV1 signaling pathway is a key regulator of lateral root development in response to changes in sulfur availability.
- CLV1 acts to inhibit lateral root development under sulfur-deficient conditions.
- This study reveals a fine-tuned mechanism for root development coordinated by CLE-CLV1 signaling and sulfur availability.
Keywords:
Arabidopsis thalianaCLAVATA1CLE peptideroot system architecturesmall signaling peptidesulfatesulfurMore Related Videos
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