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  The miRNome function transitions from regulating developmental genes to transposable elements during pollen maturation

Oliver, C., Annacondia, M. L., Wang, Z., Jullien, P. E., Slotkin, R. K., Köhler, C., et al. (2021). The miRNome function transitions from regulating developmental genes to transposable elements during pollen maturation. The Plant Cell. doi:10.1093/plcell/koab280.

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Oliver, Cecilia1, Author
Annacondia, Maria Luz1, Author
Wang, Zhenxing1, Author
Jullien, Pauline E1, Author
Slotkin, R Keith1, Author
Köhler, C.2, Author              
Martinez, German1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Epigenetic Mechanisms of Plant Reproduction, Department Köhler, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_3282043              

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 Abstract: Animal and plant microRNAs (miRNAs) are essential for the spatio-temporal regulation of development. Together with this role, plant miRNAs have been proposed to target transposable elements (TEs) and stimulate the production of epigenetically-active small interfering RNAs. This activity is evident in the plant male gamete containing structure, the male gametophyte or pollen grain. How the dual role of plant miRNAs, regulating both genes and TEs, is integrated during pollen development and which mRNAs are regulated by miRNAs in this cell type at a genome-wide scale are unknown. Here, we provide a detailed analysis of miRNA dynamics and activity during pollen development in Arabidopsis thaliana using small RNA and degradome (PARE) high-throughput sequencing. Furthermore, we uncover miRNAs loaded into the two main active Argonaute (AGO) proteins in the uninuclear and mature pollen grain, AGO1 and AGO5. Our results indicate that the developmental progression from microspore to mature pollen grain is characterized by a transition from miRNAs targeting developmental genes to miRNAs regulating transposable element activity.

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Language(s): eng - English
 Dates: 2021-11-10
 Publication Status: Published in print
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 Identifiers: DOI: 10.1093/plcell/koab280
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Title: The Plant Cell
  Abbreviation : Plant C
Source Genre: Journal
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Publ. Info: Rockville : American Society of Plant Physiologists
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 1532-298X
CoNE: https://pure.mpg.de/cone/journals/resource/1532-298X