Frontiers in Plant Science (Jan 2023)

Genome-wide identification and analysis of wheat LRR-RLK family genes following Chinese wheat mosaic virus infection

  • Shuang Liu,
  • Shuang Liu,
  • Shuang Liu,
  • Jiajia Lei,
  • Jiajia Lei,
  • Juan Zhang,
  • Juan Zhang,
  • Hanhong Liu,
  • Zhuangxin Ye,
  • Zhuangxin Ye,
  • Jin Yang,
  • Jin Yang,
  • Qiseng Lu,
  • Qiseng Lu,
  • Peng Liu,
  • Peng Liu,
  • Jianping Chen,
  • Jianping Chen,
  • Jian Yang,
  • Jian Yang

DOI
https://doi.org/10.3389/fpls.2022.1109845
Journal volume & issue
Vol. 13

Abstract

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BackgroundAs the largest plant receptor-like protein kinase (RLK) superfamily, the leucine-rich repeat receptor-like kinases (LRR-RLKs) family are involved in plant growth, development, and stress responses. However, the functions of LRR-RLKs in wheat immunity remain unknown.ResultsIn the current study, 929 LRR-RLKs were identified in Triticum aestivum genome database using the BLAST and hidden Markov models (HMM) approach and divided into 14 clades. Chromosomal localization and synteny analysis revealed that TaLRR-RLKs were randomly distributed on all chromosomes with 921 collinear events. Through the cis-acting elements analysis, we observed that TaLRR-RLKs participated in hormone response, light response, development, metabolism, and response to environmental stress. The transcript level of 14 random selected TaLRR-RLKs from each subfamily was regulated by plant hormone treatment and Chinese wheat mosaic virus (CWMV) infection. The function of TaLRR-RLKs in wheat resistance to CWMV infection was further investigated by virus-induced gene silencing assay. Additionally, the accumulation of MeJA response genes, as well as CWMV RNA were not changed in the TaLRR-RLK silencing plants under MeJA treatment.ConclusionsOur results demonstrated that TaLRR-RLKs play an important role in wheat resistance to viral infection via hormone signals and lay the groundwork for the functional study of TaLRR-RLKs in wheat.

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