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Novel Positive Regulatory Role for the SPL6 Transcription Factor in the N TIR-NB-LRR Receptor-Mediated Plant Innate Immunity

Open access
Padmanabhan, Meenu S., Ma, Shisong, Burch-Smith, Tessa M., Czymmek, Kirk, Huijser, Peter, Dinesh-Kumar, Savithramma P.·2013·PLoS Pathogens

Abstract

Following the recognition of pathogen-encoded effectors, plant TIR-NB-LRR immune receptors induce defense signaling by a largely unknown mechanism. We identify a novel and conserved role for the SQUAMOSA PROMOTER BINDING PROTEIN (SBP)-domain transcription factor SPL6 in enabling the activation of the defense transcriptome following its association with a nuclear-localized immune receptor. During an active immune response, the Nicotiana TIR-NB-LRR N immune receptor associates with NbSPL6 within distinct nuclear compartments. NbSPL6 is essential for the N-mediated resistance to Tobacco mosaic virus. Similarly, the presumed Arabidopsis ortholog AtSPL6 is required for the resistance mediated by the TIR-NB-LRR RPS4 against Pseudomonas syringae carrying the avrRps4 effector. Transcriptome analysis indicates that AtSPL6 positively regulates a subset of defense genes. A pathogen-activated nuclear-localized TIR-NB-LRR like N can therefore regulate defense genes through SPL6 in a mechanism analogous to the induction of MHC genes by mammalian immune receptors like CIITA and NLRC5.

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Metadata

Authors
Padmanabhan, M. S., Ma, S., Burch-Smith, T. M., Czymmek, K., Huijser, P., & Dinesh-Kumar, S. P.
Venue
PLoS Pathogens
Published
2013-03-14
Volume
9
Issue
3
Pages
e1003235
ISSN
  • 1553-7366 (ISSN-L)
  • 1553-7374
OpenAlex
W1965074763
Cited by
195
References
4
FWCI
22.07
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Novel Positive Regulatory Role for the SPL6 Transcription Factor in the N TIR-NB-LRR Receptor-Mediated Plant Innate Immunity. https://app.cochat.ai/papers/10.1371/journal.ppat.1003235
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Padmanabhan, M. S., Ma, S., Burch-Smith, T. M., Czymmek, K., Huijser, P., & Dinesh-Kumar, S. P. (2013). Novel Positive Regulatory Role for the SPL6 Transcription Factor in the N TIR-NB-LRR Receptor-Mediated Plant Innate Immunity. PLoS Pathogens. https://doi.org/10.1371/journal.ppat.1003235

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