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Volume 25
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Article

Unveiling the Role of RNA Recognition Motif Proteins in Orchestrating Nucleotide-Binding Site and Leucine-Rich Repeat Protein Gene Pairs and Chloroplast Immunity Pathways: Insights into Plant Defense Mechanisms

by
Fengwei Gu
1,2,
Zhikai Han
1,2,
Xiaodi Zou
1,2,
Huabin Xie
1,2,
Chun Chen
1,2,
Cuihong Huang
1,2,
Tao Guo
1,2,
Jiafeng Wang
1,2,* and
Hui Wang
1,2,*
1
College of Agriculture, South China Agricultural University, Guangzhou 510642, China
2
Nation Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2024, 25(10), 5557; https://doi.org/10.3390/ijms25105557
Submission received: 19 April 2024 / Revised: 11 May 2024 / Accepted: 15 May 2024 / Published: 20 May 2024
(This article belongs to the Special Issue Advanced Research in Plant-Fungi Interactions)
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Abstract

In plants, nucleotide-binding site and leucine-rich repeat proteins (NLRs) play pivotal roles in effector-triggered immunity (ETI). However, the precise mechanisms underlying NLR-mediated disease resistance remain elusive. Previous studies have demonstrated that the NLR gene pair Pik-H4 confers resistance to rice blast disease by interacting with the transcription factor OsBIHD1, consequently leading to the upregulation of hormone pathways. In the present study, we identified an RNA recognition motif (RRM) protein, OsRRM2, which interacted with Pik1-H4 and Pik2-H4 in vesicles and chloroplasts. OsRRM2 exhibited a modest influence on Pik-H4-mediated rice blast resistance by upregulating resistance genes and genes associated with chloroplast immunity. Moreover, the RNA-binding sequence of OsRRM2 was elucidated using systematic evolution of ligands by exponential enrichment. Transcriptome analysis further indicated that OsRRM2 promoted RNA editing of the chloroplastic gene ndhB. Collectively, our findings uncovered a chloroplastic RRM protein that facilitated the translocation of the NLR gene pair and modulated chloroplast immunity, thereby bridging the gap between ETI and chloroplast immunity.
Keywords: rice blast; NLRs; RNA recognition motif; chloroplast immunity rice blast; NLRs; RNA recognition motif; chloroplast immunity

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MDPI and ACS Style

Gu, F.; Han, Z.; Zou, X.; Xie, H.; Chen, C.; Huang, C.; Guo, T.; Wang, J.; Wang, H. Unveiling the Role of RNA Recognition Motif Proteins in Orchestrating Nucleotide-Binding Site and Leucine-Rich Repeat Protein Gene Pairs and Chloroplast Immunity Pathways: Insights into Plant Defense Mechanisms. Int. J. Mol. Sci. 2024, 25, 5557. https://doi.org/10.3390/ijms25105557

AMA Style

Gu F, Han Z, Zou X, Xie H, Chen C, Huang C, Guo T, Wang J, Wang H. Unveiling the Role of RNA Recognition Motif Proteins in Orchestrating Nucleotide-Binding Site and Leucine-Rich Repeat Protein Gene Pairs and Chloroplast Immunity Pathways: Insights into Plant Defense Mechanisms. International Journal of Molecular Sciences. 2024; 25(10):5557. https://doi.org/10.3390/ijms25105557

Chicago/Turabian Style

Gu, Fengwei, Zhikai Han, Xiaodi Zou, Huabin Xie, Chun Chen, Cuihong Huang, Tao Guo, Jiafeng Wang, and Hui Wang. 2024. "Unveiling the Role of RNA Recognition Motif Proteins in Orchestrating Nucleotide-Binding Site and Leucine-Rich Repeat Protein Gene Pairs and Chloroplast Immunity Pathways: Insights into Plant Defense Mechanisms" International Journal of Molecular Sciences 25, no. 10: 5557. https://doi.org/10.3390/ijms25105557

APA Style

Gu, F., Han, Z., Zou, X., Xie, H., Chen, C., Huang, C., Guo, T., Wang, J., & Wang, H. (2024). Unveiling the Role of RNA Recognition Motif Proteins in Orchestrating Nucleotide-Binding Site and Leucine-Rich Repeat Protein Gene Pairs and Chloroplast Immunity Pathways: Insights into Plant Defense Mechanisms. International Journal of Molecular Sciences, 25(10), 5557. https://doi.org/10.3390/ijms25105557

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