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The Diversification of Plant NBS-LRR Defense Genes Directs the Evolution of MicroRNAs That Target Them

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Zhang, Yu, Xia, Rui, Kuang, Hanhui, Meyers, Blake C.·2016·Molecular Biology and Evolution

Abstract

High expression of plant nucleotide binding site leucine-rich repeat (NBS-LRR) defense genes is often lethal to plant cells, a phenotype perhaps associated with fitness costs. Plants implement several mechanisms to control the transcript level of NBS-LRR defense genes. As negative transcriptional regulators, diverse miRNAs target NBS-LRRs in eudicots and gymnosperms. To understand the evolutionary benefits of this miRNA-NBS-LRR regulatory system, we investigated the NBS-LRRs of 70 land plants, coupling this analysis with extensive small RNA data. A tight association between the diversity of NBS-LRRs and miRNAs was found. The miRNAs typically target highly duplicated NBS-LRRs In comparison, families of heterogeneous NBS-LRRs were rarely targeted by miRNAs in Poaceae and Brassicaceae genomes. We observed that duplicated NBS-LRRs from different gene families periodically gave birth to new miRNAs. Most of these newly emerged miRNAs target the same conserved, encoded protein motif of NBS-LRRs, consistent with a model of convergent evolution for these miRNAs. By assessing the interactions between miRNAs and NBS-LRRs, we found nucleotide diversity in the wobble position of the codons in the target site drives the diversification of miRNAs. Taken together, we propose a co-evolutionary model of plant NBS-LRRs and miRNAs hypothesizing how plants balance the benefits and costs of NBS-LRR defense genes.

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Metadata

Authors
Zhang, Y., Xia, R., Kuang, H., & Meyers, B. C.
Venue
Molecular Biology and Evolution
Published
2016-08-10
Volume
33
Issue
10
Pages
2692-2705
ISSN
  • 0737-4038 (ISSN-L)
  • 1537-1719
OpenAlex
W2484850092
Cited by
186
References
4
FWCI
25.30
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: The Diversification of Plant NBS-LRR Defense Genes Directs the Evolution of MicroRNAs That Target Them. https://app.cochat.ai/papers/10.1093/molbev/msw154
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Zhang, Y., Xia, R., Kuang, H., & Meyers, B. C. (2016). The Diversification of Plant NBS-LRR Defense Genes Directs the Evolution of MicroRNAs That Target Them. Molecular Biology and Evolution. https://doi.org/10.1093/molbev/msw154

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