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Identification of Rice LncRNAs and Their Roles in the Rice Blast Resistance Network Using Transcriptome and

Xiaoliang Shan1, Shengge Xia1,2, Long Peng3,4

  • 1State Key Laboratory of Agricultural and Forestry Biosecurity, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.

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Summary
This summary is machine-generated.

This study identifies novel long non-coding RNAs (lncRNAs) that enhance rice blast resistance by regulating hormone pathways. These findings provide a molecular basis for developing disease-resistant rice varieties.

Keywords:
Magnaporthe oryzaeWGCNAceRNAhormone signalinglong non-coding RNAsplant immunity

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Area of Science:

  • Plant Molecular Biology
  • Plant Pathology
  • Genomics and Bioinformatics

Background:

  • Long non-coding RNAs (lncRNAs) are crucial in plant immunity, but their function in rice resistance against Magnaporthe oryzae (rice blast) is not well understood.
  • Accurate identification of lncRNAs is essential for understanding their regulatory roles in plant defense mechanisms.

Purpose of the Study:

  • To develop an optimized pipeline for identifying rice lncRNAs and investigate their roles in rice resistance against M. oryzae.
  • To elucidate the molecular mechanisms by which lncRNAs contribute to rice blast resistance, focusing on hormone signaling pathways.

Main Methods:

  • Integrated translatome and genome data to create an optimized protein-coding dataset.
  • Developed the "RiceLncRNA" pipeline for accurate lncRNA identification using strand-specific RNA-sequencing (ssRNA-seq) data.
  • Employed weighted gene co-expression network analysis (WGCNA) and competing endogenous RNA (ceRNA) network analysis.

Main Results:

  • Identified 9003 high-confidence rice lncRNAs, significantly improving accuracy over traditional methods.
  • Differentially expressed lncRNAs (DELs) in resistant rice varieties were linked to salicylic acid (SA) and auxin (IAA) biosynthesis, while susceptible varieties showed enrichment in carbon metabolism.
  • Key lncRNAs potentially act as miRNA sponges, regulating receptor-like kinases (RLKs), resistance (R) proteins, and hormone signaling pathways (jasmonic acid (JA), ethylene (ET), IAA).

Conclusions:

  • The study presents an optimized rice lncRNA annotation framework and reveals lncRNA-mediated regulation of hormone signaling pathways in rice blast resistance.
  • These findings offer crucial molecular insights for breeding disease-resistant rice cultivars.