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A Seed Coat Bedding Assay to Genetically Explore In Vitro How the Endosperm Controls Seed Germination in Arabidopsis thaliana
Published on: November 9, 2013
Transcript elongation factor TFIIS is involved in arabidopsis seed dormancy
Marion Grasser1, Caroline M Kane, Thomas Merkle
1Department of Life Sciences, Aalborg University, Sohngaardsholmsvej 49, DK-9000 Aalborg, Denmark.
Journal of Molecular Biology
|January 20, 2009
Summary
Arabidopsis TFIIS (transcript elongation factor S) is crucial for seed development, regulating flowering time and seed dormancy. While its absence causes embryonic lethality in mice, Arabidopsis TFIIS mutants are viable but show altered seed characteristics.
Area of Science:
- Molecular Biology
- Plant Science
- Genetics
Background:
- Transcript elongation factor TFIIS is essential for efficient mRNA synthesis by RNA polymerase II.
- While TFIIS is vital for mammalian embryonic development, its specific role in plants remains largely unexplored.
Purpose of the Study:
- To identify and characterize the function of the TFIIS gene in Arabidopsis thaliana.
- To investigate the role of TFIIS in plant development, particularly in seed characteristics.
Main Methods:
- Sequence similarity analysis to identify Arabidopsis TFIIS.
- Complementation assays in yeast using Arabidopsis TFIIS.
- Generation and analysis of T-DNA insertion and RNAi knockdown mutant lines in Arabidopsis.
- Genomewide transcript profiling and phenotypic analysis.
Main Results:
- Arabidopsis TFIIS shares sequence similarity with TFIIS from other organisms and localizes to the nucleus.
- Arabidopsis TFIIS partially complements yeast TFIIS-deficient cells.
- Arabidopsis TFIIS mutants are viable, with altered flowering time and significantly reduced seed dormancy.
- RNAi-mediated knockdown also affects seed dormancy.
Conclusions:
- Arabidopsis TFIIS plays a critical role in regulating seed development, specifically influencing flowering time and seed dormancy.
- Despite its essential role in mammals, Arabidopsis TFIIS function is not essential for vegetative growth but is critical for reproductive development.
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