GSE98408 Conservation and divergence of small RNA pathways in vascular plants revealed by small RNA analyses in lycophytes and ferns

Contributor : Xuemei ChenSeries Type : Non-coding RNA profiling by high throughput sequencingOrganism : Alsophila spinulosa ; Angiopteris fokiensis ; Asplenium nidus ; Azolla caroliniana ; Cibotium barometz ; Cyrtomium fortunei ; Dicranopteris pedata ; Diplazium esculentum ; Diplopterygium chinense ; Equisetum ramosissimum ; Isoetes sinensis ; Lygodium japonicum ; Microlepia platyphylla ; Odontosoria chinensis ; Ophioglossum vulgatum ; Palhinhaea cernua ; Phymatosorus cuspidatus ; Plenasium vachellii ; Psilotum nudum ; Pteris vittata ; Salvinia cucullata ; Salvinia molesta ; Selaginella moellendorffii ; Selaginella uncinata ; Vandenboschia striataPathways underlying miRNA biogenesis, degradation, and activity were established early in land plant evolution, but the 24-nt siRNA pathway that guides DNA methylation was incomplete in early land plants, especially lycophytes. We show that the functional diversification of key gene families such as DICER-LIKE and ARGONAUTE (AGO) as observed in angiosperms occurred early in land plants followed by parallel expansion of the AGO family in ferns and angiosperms. We uncovered an unexpected AGO family specific to lycophytes and ferns. Our phylogenetic analyses of miRNAs in lycophytes, bryophytes, ferns, and angiosperms refined the temporal origination of conserved miRNA families in land plants.

Source: GEO: Gene Expression Omnibus - July 20, 2017 Category: Genetics & Stem Cells Tags: Non-coding RNA profiling by high throughput sequencing Alsophila spinulosa Angiopteris fokiensis Asplenium nidus Azolla caroliniana Cibotium barometz Cyrtomium fortunei Dicranopteris pedata Diplazium esculentum Diplopterygium chinense Source Type: research