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Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens
Published on: February 3, 2020
Diverse small RNA-directed silencing pathways in plants
1Department of Biological Sciences, Texas Tech University, P. O. Box 43131, Lubbock, Texas 79409, USA. zhixin.xie@ttu.edu
Biochimica Et Biophysica Acta
|March 25, 2008
Summary
Plants utilize multiple small RNA pathways, involving DICER (DCL), ARGONAUTE (AGO), and RNA-DEPENDENT RNA POLYMERASE (RDR) proteins, for gene regulation. This review details microRNAs, ta-siRNAs, nat-siRNAs, and heterochromatic siRNAs in Arabidopsis thaliana.
Area of Science:
- Molecular Biology
- Genetics
- Plant Science
Background:
- Small silencing RNAs are crucial regulatory molecules in eukaryotes.
- Their biogenesis involves conserved protein families like DICER (DCL), ARGONAUTE (AGO), and RNA-DEPENDENT RNA POLYMERASE (RDR).
- Plants exhibit complex small RNA pathways with multiple DCL, RDR, and AGO proteins.
Purpose of the Study:
- To provide an overview of diverse small RNA-directed silencing pathways in plants.
- To highlight the biogenesis and function of various small RNA classes.
- Focuses on genetic analyses in the model plant Arabidopsis thaliana.
Main Methods:
- Review of existing literature and genetic analyses.
- Focus on conserved protein families involved in small RNA pathways.
- Examination of distinct small RNA classes: miRNAs, ta-siRNAs, nat-siRNAs, and heterochromatic siRNAs.
Main Results:
- Plants employ multiple, distinct small RNA pathways.
- Each pathway utilizes specific combinations of silencing factors.
- Key pathways include those for microRNAs (miRNAs), trans-acting siRNAs (ta-siRNAs), natural cis-antisense transcripts-associated siRNAs (nat-siRNAs), and heterochromatic siRNAs.
Conclusions:
- Arabidopsis thaliana serves as a model for understanding plant small RNA pathways.
- Multiple small RNA pathways contribute to gene regulation in plants.
- These pathways are essential for various biological processes.
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