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24-nt reproductive phasiRNAs are broadly present in angiosperms.
- Source :
- Nature Communications; 2/7/2019, Vol. 10 Issue 1, p1-1, 1p
- Publication Year :
- 2019
-
Abstract
- Small RNAs are key regulators in plant growth and development. One subclass, phased siRNAs (phasiRNAs) require a trigger microRNA for their biogenesis. In grasses, two pathways yield abundant phasiRNAs during anther development; miR2275 triggers one class, 24-nt phasiRNAs, coincident with meiosis, while a second class of 21-nt phasiRNAs are present in premeiotic anthers. Here we report that the 24-nt phasiRNA pathway is widely present in flowering plants, indicating that 24-nt reproductive phasiRNAs likely originated with the evolutionary emergence of anthers. Deep comparative genomic analyses demonstrated that this miR2275/24-nt phasiRNA pathway is widely present in eudicots plants, however, it is absent in legumes and in the model plant Arabidopsis, demonstrating a dynamic evolutionary history of this pathway. In Solanaceae species, 24-nt phasiRNAs were observed, but the miR2275 trigger is missing and some loci displaying 12-nt phasing. Both the miR2275-triggered and Solanaceae 24-nt phasiRNAs are enriched in meiotic stages, implicating these phasiRNAs in anther and/or pollen development, a spatiotemporal pattern consistent in all angiosperm lineages that deploy them. 24-nt phased siRNA (phasiRNA) regulate reproduction in grasses, yet are absent from Arabidopsis, and were thought to be monocot-specific. Here, Xia et al. show that 24-nt phasiRNAs are in fact broadly distributed among eudicots and are consistently enriched during meiosis, despite possibly arising from distinct biogenesis pathways. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 10
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 134584630
- Full Text :
- https://doi.org/10.1038/s41467-019-08543-0