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Plant microRNAs Regulate Innate Immunity Through Diverse Mechanisms

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Plant microRNAs

Part of the book series: Concepts and Strategies in Plant Sciences ((CSPS))

Abstract

Plant miRNAs are a class of small RNAs of 20–24 nucleotides that play broad roles in gene regulation by directing Argonaute proteins to target RNAs based on sequence complementarity. Plant innate immunity consists of two-layered defense mechanisms. In the first line of defense, pathogen molecular pattern triggered immunity (PTI) recognizes conserved pathogen molecules and confers broad-spectrum resistance. Virulent pathogens deliver effectors into plant cells to suppress PTI for successful infection. During plant-pathogen coevolution, the second line of defense evolved, which detects pathogen effectors and triggers a strong but race-specific defense reaction, usually accompanied by rapid programmed cell death, which is termed effector-triggered immunity (ETI). Antiviral RNA silencing is a form of PTI that directly targets viral pathogens. In this chapter, we summarize current knowledge of miRNA-mediated regulation of genes involving antiviral RNA silencing, PTI and ETI, and analyze their conservation in different plant lineages. Future directions for research on elucidating miRNA-mediated regulation of plant immunity are also discussed.

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Acknowledgements

This work was supported by the Fundamental Research Funds for the Central Universities (2662014PY008) and the HZAU start fund (2013RC001).

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Authors and Affiliations

  1. Key Laboratory of Horticultural Plant Biology (MOE), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China

    Feng Li & Yudan Wang

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  1. Feng Li
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Correspondence to Feng Li .

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Editors and Affiliations

  1. Faculdade de Ciências, BioISI—Biosystems & Integrative Sciences Institute, Universidade de Lisboa, Lisbon, Portugal

    Célia Miguel

  2. School of Biological Sciences, University of East Anglia, Norwich, UK

    Tamas Dalmay

  3. iBET and ITQB NOVA, Oeiras, Portugal

    Inês Chaves

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Li, F., Wang, Y. (2020). Plant microRNAs Regulate Innate Immunity Through Diverse Mechanisms. In: Miguel, C., Dalmay, T., Chaves, I. (eds) Plant microRNAs. Concepts and Strategies in Plant Sciences. Springer, Cham. https://doi.org/10.1007/978-3-030-35772-6_11

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