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Domestication of high-copy transposons underlays the wheat small RNA response to an obligate pathogen

Poretti, Manuel and Praz, Coraline Rosalie and Meile, Lucas and Kälin, Carol and Schaefer, Luisa Katharina and Schäfli, Michael and Widrig, Victoria and Sanchez-Vallet, Andrea and Wicker, Thomas and Bourras, Salim (2020). Domestication of high-copy transposons underlays the wheat small RNA response to an obligate pathogen. Molecular Biology and Evolution. 37 , 839–848
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Abstract

Plant genomes have evolved several evolutionary mechanisms to tolerate and make use of transposable elements (TEs).
Of these, transposon domestication into cis-regulatory and microRNA (miRNA) sequences is proposed to contribute to
abiotic/biotic stress adaptation in plants. The wheat genome is derived at 85% from TEs, and contains thousands of
miniature inverted-repeat transposable elements (MITEs), whose sequences are particularly prone for domestication into
miRNA precursors. In this study, we investigate the contribution of TEs to the wheat small RNA immune response to the
lineage-specific, obligate powdery mildew pathogen. We show that MITEs of the Mariner superfamily contribute the
largest diversity of miRNAs to the wheat immune response. In particular, MITE precursors of miRNAs are wide-spread
over the wheat genome, and highly conserved copies are found in the Lr34 and QPm.tut-4A mildew resistance loci. Our
work suggests that transposon domestication is an important evolutionary force driving miRNA functional innovation in
wheat immunity.

Authors/Creators:Poretti, Manuel and Praz, Coraline Rosalie and Meile, Lucas and Kälin, Carol and Schaefer, Luisa Katharina and Schäfli, Michael and Widrig, Victoria and Sanchez-Vallet, Andrea and Wicker, Thomas and Bourras, Salim
Title:Domestication of high-copy transposons underlays the wheat small RNA response to an obligate pathogen
Year of publishing :2020
Volume:37
Page range:839–848
Number of Pages:10
Publisher:Oxford University Press
ISSN:0737-4038
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Genetics (medical genetics to be 30107 and agricultural genetics to be 40402)
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Evolutionary Biology
Keywords:wheat, transposable elements, small RNAs, powdery mildew
URN:NBN:urn:nbn:se:slu:epsilon-p-103117
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-103117
Additional ID:
Type of IDID
DOI10.1093/molbev/msz272
ID Code:16766
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Deposited By: SLUpub Connector
Deposited On:18 May 2020 11:51
Metadata Last Modified:18 May 2020 11:51

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