TAS3 miR390-dependent loci in non-vascular land plants: Towards a comprehensive reconstruction of the gene evolutionary history
- Subject Areas
- Bioinformatics, Genomics, Molecular Biology, Plant Science
- silencing, trans-acting RNA, small interfering RNA, ARF genes, micro RNA, charophyte algae, bryophytes
- © 2018 Morozov et al.
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2018. TAS3 miR390-dependent loci in non-vascular land plants: Towards a comprehensive reconstruction of the gene evolutionary history. PeerJ Preprints 6:e26545v1 https://doi.org/10.7287/peerj.preprints.26545v1
Trans-acting small interfering RNAs (ta-siRNAs) are transcribed from protein non-coding genomic loci and belong to a plant-specific class of endogenous small RNAs. These siRNAs have been found to regulate gene expression in most taxa including seed plants, gymnosperms, ferns and mosses. In this study, bioinformatic and experimental PCR-based approaches were used as tools to analyze TAS3 and TAS6 loci in transcriptomes and genomic DNAs from representatives of evolutionary distant Bryophyta, Marchantiophyta and Anthocerotophyta. We revealed previously undiscovered TAS3 loci in classes Sphagnopsida and Anthocerotopsida, as well as TAS6 loci in Bryophyta classes Tetraphidiopsida, Polytrichopsida, Andreaeopsida and Takakiopsida. These data further unveil the evolutionary pathway of the miR390-dependent TAS3 loci in land plants. We also identified SGS3-coding sequences in charophytes and hypothesized that the appearance of TAS3-related sequences could take place at a very early step in evolutionary transition from charophyte algae to an earliest common ancestor of land plants.
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