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Updated: Aug 9, 2026
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Inducible, Cell Type-Specific Expression in Arabidopsis thaliana Through LhGR-Mediated Trans-Activation
Published on: April 19, 2019
Gene expression programs during shoot, root, and callus development in Arabidopsis tissue culture
Ping Che1, Sonia Lall, Dan Nettleton
1Plant Sciences Institute, Iowa State University, Ames, 50011, USA.
Plant Physiology
|May 2, 2006
Summary
Shoot regeneration in Arabidopsis thaliana is regulated by the transcription factor RAP2.6L. This gene is crucial for efficient shoot formation in tissue culture by controlling downstream gene expression.
Area of Science:
- Plant molecular biology
- Plant development
- Arabidopsis thaliana research
Background:
- Plant tissue culture allows regeneration of whole plants from explants.
- Specific media conditions direct organogenesis (shoots, roots, callus).
- Identifying regulatory genes is key to understanding plant regeneration.
Purpose of the Study:
- To identify genes involved in shoot regeneration from Arabidopsis root explants.
- To characterize the role of the transcription factor RAP2.6L in this process.
- To elucidate the regulatory network controlled by RAP2.6L during shoot development.
Main Methods:
- Gene-profiling to identify differentially expressed genes.
- T-DNA knockdown mutations to assess gene function.
- Promoter:beta-glucuronidase (GUS) fusions to study gene expression patterns.
Main Results:
- RAP2.6L (a transcription factor) was significantly upregulated during early shoot regeneration.
- RAP2.6L knockdown mutations impaired shoot regeneration efficiency.
- RAP2.6L expression was localized to developing shoots and leaves.
- Knockdown of RAP2.6L reduced expression of downstream genes, including CUP-SHAPED COTYLEDON2.
Conclusions:
- RAP2.6L is a critical regulator of shoot regeneration in Arabidopsis.
- Its function is transcriptionally controlled and impacts multiple developmental pathways.
- RAP2.6L acts within a gene network to control shoot development and meristem specification.
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